1065656427984 has 80 divisors (see below), whose sum is σ = 3058953936640. Its totient is φ = 355204258560.

The previous prime is 1065656427971. The next prime is 1065656427989. The reversal of 1065656427984 is 4897246565601.

1065656427984 is a `hidden beast` number, since 1 + 0 + 6 + 565 + 64 + 2 + 7 + 9 + 8 + 4 = 666.

It is a super-2 number, since 2×1065656427984² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065656427989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17793129 + ... + 17852919.

It is an arithmetic number, because the mean of its divisors is an integer number (38236924208).

Almost surely, 2^{1065656427984} is an apocalyptic number.

It is an amenable number.

1065656427984 is an abundant number, since it is smaller than the sum of its proper divisors (1993297508656).

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

1065656427984 is a wasteful number, since it uses less digits than its factorization.

1065656427984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101065 (or 101053 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 1065656427984 in words is "one trillion, sixty-five billion, six hundred fifty-six million, four hundred twenty-seven thousand, nine hundred eighty-four".