2120256104564 has 96 divisors (see below), whose sum is σ = 4297279365120. Its totient is φ = 907010462592.

The previous prime is 2120256104563. The next prime is 2120256104573. The reversal of 2120256104564 is 4654016520212.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120256104563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153556949 + ... + 153570755.

It is an arithmetic number, because the mean of its divisors is an integer number (44763326720).

Almost surely, 2^{2120256104564} is an apocalyptic number.

It is an amenable number.

2120256104564 is an abundant number, since it is smaller than the sum of its proper divisors (2177023260556).

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

2120256104564 is a wasteful number, since it uses less digits than its factorization.

2120256104564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17197 (or 17195 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 2120256104564 in words is "two trillion, one hundred twenty billion, two hundred fifty-six million, one hundred four thousand, five hundred sixty-four".