2157938397512 has 16 divisors (see below), whose sum is σ = 4058358471600. Its totient is φ = 1075709471760.

The previous prime is 2157938397509. The next prime is 2157938397577.

2157938397512 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407463062 + ... + 407468357.

It is an arithmetic number, because the mean of its divisors is an integer number (253647404475).

Almost surely, 2^{2157938397512} is an apocalyptic number.

It is an amenable number.

2157938397512 is a deficient number, since it is larger than the sum of its proper divisors (1900420074088).

2157938397512 is a wasteful number, since it uses less digits than its factorization.

2157938397512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814931756 (or 814931752 counting only the distinct ones).

The product of its digits is 28576800, while the sum is 62.

The spelling of 2157938397512 in words is "two trillion, one hundred fifty-seven billion, nine hundred thirty-eight million, three hundred ninety-seven thousand, five hundred twelve".