2151326312655 has 48 divisors (see below), whose sum is σ = 3756617441280. Its totient is φ = 1050774850944.

The previous prime is 2151326312633. The next prime is 2151326312713. The reversal of 2151326312655 is 5562136231512.

It is not a de Polignac number, because 2151326312655 - 2⁹ = 2151326312143 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3019195 + ... + 3663084.

It is an arithmetic number, because the mean of its divisors is an integer number (78262863360).

Almost surely, 2^{2151326312655} is an apocalyptic number.

2151326312655 is a deficient number, since it is larger than the sum of its proper divisors (1605291128625).

2151326312655 is a wasteful number, since it uses less digits than its factorization.

2151326312655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6682440 (or 6682427 counting only the distinct ones).

The product of its digits is 324000, while the sum is 42.

The spelling of 2151326312655 in words is "two trillion, one hundred fifty-one billion, three hundred twenty-six million, three hundred twelve thousand, six hundred fifty-five".