1156493999640 has 384 divisors, whose sum is σ = 4082432659200. Its totient is φ = 261304243200.

The previous prime is 1156493999611. The next prime is 1156493999657. The reversal of 1156493999640 is 469993946511.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 510141787 + ... + 510144053.

It is an arithmetic number, because the mean of its divisors is an integer number (10631335050).

Almost surely, 2^{1156493999640} is an apocalyptic number.

1156493999640 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 1156493999640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041216329600).

1156493999640 is an abundant number, since it is smaller than the sum of its proper divisors (2925938659560).

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

1156493999640 is a wasteful number, since it uses less digits than its factorization.

1156493999640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255 (or 3244 counting only the distinct ones).

The product of its (nonzero) digits is 56687040, while the sum is 66.

The spelling of 1156493999640 in words is "one trillion, one hundred fifty-six billion, four hundred ninety-three million, nine hundred ninety-nine thousand, six hundred forty".