1067891156640 has 960 divisors, whose sum is σ = 4720249416960. Its totient is φ = 220883189760.

The previous prime is 1067891156597. The next prime is 1067891156641. The reversal of 1067891156640 is 466511987601.

1067891156640 is a `hidden beast` number, since 1 + 0 + 6 + 78 + 9 + 1 + 1 + 566 + 4 + 0 = 666.

It is a super-2 number, since 2×1067891156640² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1067891156641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 228521344 + ... + 228526016.

It is an arithmetic number, because the mean of its divisors is an integer number (4916926476).

Almost surely, 2^{1067891156640} is an apocalyptic number.

1067891156640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1067891156640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2360124708480).

1067891156640 is an abundant number, since it is smaller than the sum of its proper divisors (3652358260320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1067891156640 is a wasteful number, since it uses less digits than its factorization.

1067891156640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4947 (or 4930 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 1067891156640 in words is "one trillion, sixty-seven billion, eight hundred ninety-one million, one hundred fifty-six thousand, six hundred forty".