1056447395640 has 640 divisors, whose sum is σ = 4378202357760. Its totient is φ = 222493879296.

The previous prime is 1056447395617. The next prime is 1056447395749. The reversal of 1056447395640 is 465937446501.

It is a happy number.

1056447395640 is a `hidden beast` number, since 1 + 0 + 5 + 6 + 4 + 4 + 73 + 9 + 564 + 0 = 666.

It is a super-2 number, since 2×1056447395640² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 178964929 + ... + 178970831.

It is an arithmetic number, because the mean of its divisors is an integer number (6840941184).

Almost surely, 2^{1056447395640} is an apocalyptic number.

1056447395640 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 1056447395640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2189101178880).

1056447395640 is an abundant number, since it is smaller than the sum of its proper divisors (3321754962120).

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

1056447395640 is a wasteful number, since it uses less digits than its factorization.

1056447395640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6553 (or 6540 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 1056447395640 in words is "one trillion, fifty-six billion, four hundred forty-seven million, three hundred ninety-five thousand, six hundred forty".