75490310025 has 81 divisors (see below), whose sum is σ = 146516474559. Its totient is φ = 37138083840.

The previous prime is 75490310017. The next prime is 75490310029. The reversal of 75490310025 is 52001309457.

The square root of 75490310025 is 274755.

It is a perfect power (a square), and thus also a powerful number.

75490310025 is a `hidden beast` number, since 7 + 549 + 0 + 3 + 100 + 2 + 5 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 62971385481 + 12518924544 = 250941^2 + 111888^2 .

It is not a de Polignac number, because 75490310025 - 2³ = 75490310017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75490310029) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 53576521 + ... + 53577929.

Almost surely, 2^75490310025 is an apocalyptic number.

75490310025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

75490310025 is the 274755-th square number.

75490310025 is the 137378-th centered octagonal number.

It is an amenable number.

75490310025 is a deficient number, since it is larger than the sum of its proper divisors (71026164534).

75490310025 is a wasteful number, since it uses less digits than its factorization.

75490310025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

Multiplying 75490310025 by its sum of digits (36), we get a square (2717651160900 = 1648530²).

The spelling of 75490310025 in words is "seventy-five billion, four hundred ninety million, three hundred ten thousand, twenty-five".