77752425 has 24 divisors (see below), whose sum is σ = 129743680. Its totient is φ = 41083200.

The previous prime is 77752421. The next prime is 77752453. The reversal of 77752425 is 52425777.

It is not a de Polignac number, because 77752425 - 2² = 77752421 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77752421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3420 + ... + 12930.

Almost surely, 2^77752425 is an apocalyptic number.

77752425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77752425 is a deficient number, since it is larger than the sum of its proper divisors (51991255).

77752425 is a wasteful number, since it uses less digits than its factorization.

77752425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9633 (or 9628 counting only the distinct ones).

The product of its digits is 137200, while the sum is 39.

The square root of 77752425 is about 8817.7335523365. The cubic root of 77752425 is about 426.8133362807.

The spelling of 77752425 in words is "seventy-seven million, seven hundred fifty-two thousand, four hundred twenty-five".