2156774252400 has 90 divisors (see below), whose sum is σ = 7484605772280. Its totient is φ = 575139799680.

The previous prime is 2156774252393. The next prime is 2156774252443. The reversal of 2156774252400 is 42524776512.

2156774252400 is a `hidden beast` number, since 2 + 1 + 56 + 7 + 74 + 2 + 524 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 299548380 + ... + 299555579.

Almost surely, 2^{2156774252400} is an apocalyptic number.

2156774252400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156774252400 is an abundant number, since it is smaller than the sum of its proper divisors (5327831519880).

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

2156774252400 is a wasteful number, since it uses less digits than its factorization.

2156774252400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599103983 (or 599103969 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 2156774252400 in words is "two trillion, one hundred fifty-six billion, seven hundred seventy-four million, two hundred fifty-two thousand, four hundred".