2640464106291 has 24 divisors (see below), whose sum is σ = 4160794126320. Its totient is φ = 1600257120000.

The previous prime is 2640464106277. The next prime is 2640464106347. The reversal of 2640464106291 is 1926014640462.

2640464106291 is a `hidden beast` number, since 2 + 6 + 4 + 0 + 4 + 6 + 4 + 10 + 629 + 1 = 666.

It is not a de Polignac number, because 2640464106291 - 2³⁷ = 2503025152819 is a prime.

It is a super-2 number, since 2×2640464106291² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2640464106251) 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, 8117791 + ... + 8436791.

It is an arithmetic number, because the mean of its divisors is an integer number (173366421930).

Almost surely, 2^{2640464106291} is an apocalyptic number.

2640464106291 is a deficient number, since it is larger than the sum of its proper divisors (1520330020029).

2640464106291 is a wasteful number, since it uses less digits than its factorization.

2640464106291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402627 (or 402624 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 2640464106291 in words is "two trillion, six hundred forty billion, four hundred sixty-four million, one hundred six thousand, two hundred ninety-one".