2156124220536 has 64 divisors (see below), whose sum is σ = 6332672545920. Its totient is φ = 603111669120.

The previous prime is 2156124220511. The next prime is 2156124220577. The reversal of 2156124220536 is 6350224216512.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 2156124220494 and 2156124220503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314117230 + ... + 314124093.

It is an arithmetic number, because the mean of its divisors is an integer number (98948008530).

Almost surely, 2^{2156124220536} is an apocalyptic number.

2156124220536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2156124220536 is an abundant number, since it is smaller than the sum of its proper divisors (4176548325384).

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

2156124220536 is a wasteful number, since it uses less digits than its factorization.

2156124220536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628241356 (or 628241352 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 2156124220536 in words is "two trillion, one hundred fifty-six billion, one hundred twenty-four million, two hundred twenty thousand, five hundred thirty-six".