74378925625 has 15 divisors (see below), whose sum is σ = 92952426171. Its totient is φ = 59497686000.

The previous prime is 74378925587. The next prime is 74378925641. The reversal of 74378925625 is 52652987347.

It is a happy number.

The square root of 74378925625 is 272725.

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

It can be written as a sum of positive squares in 7 ways, for example, as 70754404009 + 3624521616 = 265997^2 + 60204^2 .

It is not a de Polignac number, because 74378925625 - 2¹³ = 74378917433 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

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 74378925625.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 6812671 + ... + 6823579.

Almost surely, 2^74378925625 is an apocalyptic number.

74378925625 is the 272725-th square number.

74378925625 is the 136363-rd centered octagonal number.

It is an amenable number.

74378925625 is a deficient number, since it is larger than the sum of its proper divisors (18573500546).

74378925625 is an frugal number, since it uses more digits than its factorization.

74378925625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21838 (or 10914 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 58.

The spelling of 74378925625 in words is "seventy-four billion, three hundred seventy-eight million, nine hundred twenty-five thousand, six hundred twenty-five".