1656021510052 has 72 divisors (see below), whose sum is σ = 3684695771904. Its totient is φ = 645351271488.

The previous prime is 1656021510001. The next prime is 1656021510053. The reversal of 1656021510052 is 2500151206561.

It is not an unprimeable number, because it can be changed into a prime (1656021510053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4679508 + ... + 5020939.

Almost surely, 2^{1656021510052} is an apocalyptic number.

It is an amenable number.

1656021510052 is an abundant number, since it is smaller than the sum of its proper divisors (2028674261852).

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

1656021510052 is a wasteful number, since it uses less digits than its factorization.

1656021510052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9700545 (or 9700536 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 1656021510052 in words is "one trillion, six hundred fifty-six billion, twenty-one million, five hundred ten thousand, fifty-two".