2156585356508 has 12 divisors (see below), whose sum is σ = 4117117498872. Its totient is φ = 980266071120.

The previous prime is 2156585356501. The next prime is 2156585356517. The reversal of 2156585356508 is 8056535856512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156585356501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24506651735 + ... + 24506651822.

It is an arithmetic number, because the mean of its divisors is an integer number (343093124906).

Almost surely, 2^{2156585356508} is an apocalyptic number.

It is an amenable number.

2156585356508 is a deficient number, since it is larger than the sum of its proper divisors (1960532142364).

2156585356508 is a wasteful number, since it uses less digits than its factorization.

2156585356508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49013303572 (or 49013303570 counting only the distinct ones).

The product of its (nonzero) digits is 43200000, while the sum is 59.

The spelling of 2156585356508 in words is "two trillion, one hundred fifty-six billion, five hundred eighty-five million, three hundred fifty-six thousand, five hundred eight".