2156214816504 has 96 divisors (see below), whose sum is σ = 6674608986240. Its totient is φ = 616005000000.

The previous prime is 2156214816461. The next prime is 2156214816557. The reversal of 2156214816504 is 4056184126512.

2156214816504 is a `hidden beast` number, since 2 + 1 + 5 + 62 + 1 + 4 + 81 + 6 + 504 = 666.

It is a super-2 number, since 2×2156214816504² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2156214816504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5480379 + ... + 5860629.

It is an arithmetic number, because the mean of its divisors is an integer number (69527176940).

Almost surely, 2^{2156214816504} is an apocalyptic number.

2156214816504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2156214816504 is an abundant number, since it is smaller than the sum of its proper divisors (4518394169736).

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

2156214816504 is a wasteful number, since it uses less digits than its factorization.

2156214816504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391521 (or 391514 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 2156214816504 in words is "two trillion, one hundred fifty-six billion, two hundred fourteen million, eight hundred sixteen thousand, five hundred four".