2157646351025 has 72 divisors (see below), whose sum is σ = 2969034969600. Its totient is φ = 1554213830400.

The previous prime is 2157646351001. The next prime is 2157646351093. The reversal of 2157646351025 is 5201536467512.

It is a de Polignac number, because none of the positive numbers 2^k-2157646351025 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 134232389 + ... + 134248461.

It is an arithmetic number, because the mean of its divisors is an integer number (41236596800).

Almost surely, 2^{2157646351025} is an apocalyptic number.

2157646351025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2157646351025 is a deficient number, since it is larger than the sum of its proper divisors (811388618575).

2157646351025 is a wasteful number, since it uses less digits than its factorization.

2157646351025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16527 (or 16511 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 2157646351025 in words is "two trillion, one hundred fifty-seven billion, six hundred forty-six million, three hundred fifty-one thousand, twenty-five".