2640585203857 has 16 divisors (see below), whose sum is σ = 2650327610112. Its totient is φ = 2630867558400.

The previous prime is 2640585203849. The next prime is 2640585203873. The reversal of 2640585203857 is 7583025850462.

It is a cyclic number.

It is not a de Polignac number, because 2640585203857 - 2³ = 2640585203849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2640585203798 and 2640585203807.

It is not an unprimeable number, because it can be changed into a prime (2640585203057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763835473 + ... + 763838929.

It is an arithmetic number, because the mean of its divisors is an integer number (165645475632).

Almost surely, 2^{2640585203857} is an apocalyptic number.

It is an amenable number.

2640585203857 is a deficient number, since it is larger than the sum of its proper divisors (9742406255).

2640585203857 is a wasteful number, since it uses less digits than its factorization.

2640585203857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6288.

The product of its (nonzero) digits is 16128000, while the sum is 55.

The spelling of 2640585203857 in words is "two trillion, six hundred forty billion, five hundred eighty-five million, two hundred three thousand, eight hundred fifty-seven".