2640404577 has 12 divisors (see below), whose sum is σ = 3680263664. Its totient is φ = 1683735240.

The previous prime is 2640404539. The next prime is 2640404647. The reversal of 2640404577 is 7754040462.

It is not a de Polignac number, because 2640404577 - 2⁶ = 2640404513 is a prime.

It is a super-4 number, since 4×2640404577⁴ (a number of 39 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640404527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 830299 + ... + 833472.

Almost surely, 2^2640404577 is an apocalyptic number.

It is an amenable number.

2640404577 is a deficient number, since it is larger than the sum of its proper divisors (1039859087).

2640404577 is a wasteful number, since it uses less digits than its factorization.

2640404577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663820 (or 1663797 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 39.

The square root of 2640404577 is about 51384.8671984272. The cubic root of 2640404577 is about 1382.1552433632.

The spelling of 2640404577 in words is "two billion, six hundred forty million, four hundred four thousand, five hundred seventy-seven".