2638764015025 has 12 divisors (see below), whose sum is σ = 3272131035612. Its totient is φ = 2110970143040.

The previous prime is 2638764014989. The next prime is 2638764015029. The reversal of 2638764015025 is 5205104678362.

It can be written as a sum of positive squares in 6 ways, for example, as 26545207329 + 2612218807696 = 162927^2 + 1616236^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2638764015025 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2638764015025.

It is not an unprimeable number, because it can be changed into a prime (2638764015029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318579 + ... + 2319271.

It is an arithmetic number, because the mean of its divisors is an integer number (272677586301).

Almost surely, 2^{2638764015025} is an apocalyptic number.

2638764015025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2638764015025 is a deficient number, since it is larger than the sum of its proper divisors (633367020587).

2638764015025 is a wasteful number, since it uses less digits than its factorization.

2638764015025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053460 (or 2053455 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 2638764015025 in words is "two trillion, six hundred thirty-eight billion, seven hundred sixty-four million, fifteen thousand, twenty-five".