2688861939057 has 24 divisors (see below), whose sum is σ = 4481850948224. Its totient is φ = 1521575129664.

The previous prime is 2688861939017. The next prime is 2688861939073. The reversal of 2688861939057 is 7509391688862.

2688861939057 is a `hidden beast` number, since 26 + 88 + 86 + 19 + 390 + 57 = 666.

It is not a de Polignac number, because 2688861939057 - 2¹² = 2688861934961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2688861939017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207179668 + ... + 207192645.

Almost surely, 2^{2688861939057} is an apocalyptic number.

It is an amenable number.

2688861939057 is a deficient number, since it is larger than the sum of its proper divisors (1792989009167).

2688861939057 is a wasteful number, since it uses less digits than its factorization.

2688861939057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414372429 (or 414372426 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 72.

The spelling of 2688861939057 in words is "two trillion, six hundred eighty-eight billion, eight hundred sixty-one million, nine hundred thirty-nine thousand, fifty-seven".