75631725 has 120 divisors (see below), whose sum is σ = 160692840. Its totient is φ = 35043840.

The previous prime is 75631709. The next prime is 75631733. The reversal of 75631725 is 52713657.

It can be written as a sum of positive squares in 12 ways, for example, as 72488196 + 3143529 = 8514^2 + 1773^2 .

It is not a de Polignac number, because 75631725 - 2⁴ = 75631709 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 75631725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4448917 + ... + 4448933.

It is an arithmetic number, because the mean of its divisors is an integer number (1339107).

Almost surely, 2^75631725 is an apocalyptic number.

75631725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

75631725 is an abundant number, since it is smaller than the sum of its proper divisors (85061115).

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

75631725 is a wasteful number, since it uses less digits than its factorization.

75631725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 38 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 75631725 is about 8696.6502171813. The cubic root of 75631725 is about 422.8970626238.

The spelling of 75631725 in words is "seventy-five million, six hundred thirty-one thousand, seven hundred twenty-five".