2539964472640 has 56 divisors (see below), whose sum is σ = 6912331892352. Its totient is φ = 870844961280.

The previous prime is 2539964472601. The next prime is 2539964472649. The reversal of 2539964472640 is 462744699352.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539964472649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566954116 + ... + 566958595.

Almost surely, 2^{2539964472640} is an apocalyptic number.

2539964472640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2539964472640 is an abundant number, since it is smaller than the sum of its proper divisors (4372367419712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2539964472640 is a wasteful number, since it uses less digits than its factorization.

2539964472640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133912735 (or 1133912725 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 61.

The spelling of 2539964472640 in words is "two trillion, five hundred thirty-nine billion, nine hundred sixty-four million, four hundred seventy-two thousand, six hundred forty".