2638551725 has 12 divisors (see below), whose sum is σ = 3464263764. Its totient is φ = 1986673920.

The previous prime is 2638551703. The next prime is 2638551779. The reversal of 2638551725 is 5271558362.

2638551725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 42954916 + 2595596809 = 6554^2 + 50947^2 .

It is not a de Polignac number, because 2638551725 - 2⁶ = 2638551661 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3103754 + ... + 3104603.

It is an arithmetic number, because the mean of its divisors is an integer number (288688647).

Almost surely, 2^2638551725 is an apocalyptic number.

2638551725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2638551725 is a deficient number, since it is larger than the sum of its proper divisors (825712039).

2638551725 is a wasteful number, since it uses less digits than its factorization.

2638551725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208384 (or 6208379 counting only the distinct ones).

The product of its digits is 504000, while the sum is 44.

The square root of 2638551725 is about 51366.8348742649. The cubic root of 2638551725 is about 1381.8318676212.

The spelling of 2638551725 in words is "two billion, six hundred thirty-eight million, five hundred fifty-one thousand, seven hundred twenty-five".