74778625 has 8 divisors (see below), whose sum is σ = 93323880. Its totient is φ = 59822800.

The previous prime is 74778577. The next prime is 74778653. The reversal of 74778625 is 52687747.

It can be written as a sum of positive squares in 4 ways, for example, as 543169 + 74235456 = 737^2 + 8616^2 .

It is not a de Polignac number, because 74778625 - 2²¹ = 72681473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298990 + ... + 299239.

It is an arithmetic number, because the mean of its divisors is an integer number (11665485).

Almost surely, 2^74778625 is an apocalyptic number.

It is an amenable number.

74778625 is a deficient number, since it is larger than the sum of its proper divisors (18545255).

74778625 is an equidigital number, since it uses as much as digits as its factorization.

74778625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598244 (or 598234 counting only the distinct ones).

The product of its digits is 658560, while the sum is 46.

The square root of 74778625 is about 8647.4635009348. The cubic root of 74778625 is about 421.3010017290.

The spelling of 74778625 in words is "seventy-four million, seven hundred seventy-eight thousand, six hundred twenty-five".