1021697435952 has 100 divisors (see below), whose sum is σ = 2957370471880. Its totient is φ = 340533372672.

The previous prime is 1021697435917. The next prime is 1021697435981. The reversal of 1021697435952 is 2595347961201.

1021697435952 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 6 + 9 + 7 + 43 + 595 + 2 = 666.

It is a super-2 number, since 2×1021697435952² (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 an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16322988 + ... + 16385460.

Almost surely, 2^{1021697435952} is an apocalyptic number.

1021697435952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021697435952 is an abundant number, since it is smaller than the sum of its proper divisors (1935673035928).

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

1021697435952 is a wasteful number, since it uses less digits than its factorization.

1021697435952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75112 (or 75097 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 1021697435952 in words is "one trillion, twenty-one billion, six hundred ninety-seven million, four hundred thirty-five thousand, nine hundred fifty-two".