2657172725 has 6 divisors (see below), whose sum is σ = 3294894210. Its totient is φ = 2125738160.

The previous prime is 2657172703. The next prime is 2657172737. The reversal of 2657172725 is 5272717562.

It can be written as a sum of positive squares in 3 ways, for example, as 361038001 + 2296134724 = 19001^2 + 47918^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2657172725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53143430 + ... + 53143479.

It is an arithmetic number, because the mean of its divisors is an integer number (549149035).

Almost surely, 2^2657172725 is an apocalyptic number.

2657172725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2657172725 is a deficient number, since it is larger than the sum of its proper divisors (637721485).

2657172725 is a wasteful number, since it uses less digits than its factorization.

2657172725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106286919 (or 106286914 counting only the distinct ones).

The product of its digits is 411600, while the sum is 44.

The square root of 2657172725 is about 51547.7712903284. The cubic root of 2657172725 is about 1385.0749089539.

The spelling of 2657172725 in words is "two billion, six hundred fifty-seven million, one hundred seventy-two thousand, seven hundred twenty-five".