78632425 has 6 divisors (see below), whose sum is σ = 97504238. Its totient is φ = 62905920.

The previous prime is 78632419. The next prime is 78632441. The reversal of 78632425 is 52423687.

It can be written as a sum of positive squares in 3 ways, for example, as 150544 + 78481881 = 388^2 + 8859^2 .

It is not a de Polignac number, because 78632425 - 2⁷ = 78632297 is a prime.

It is a super-2 number, since 2×78632425² = 12366116522761250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1572624 + ... + 1572673.

Almost surely, 2^78632425 is an apocalyptic number.

It is an amenable number.

78632425 is a deficient number, since it is larger than the sum of its proper divisors (18871813).

78632425 is a wasteful number, since it uses less digits than its factorization.

78632425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145307 (or 3145302 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 78632425 is about 8867.4925993767. The cubic root of 78632425 is about 428.4175202643.

The spelling of 78632425 in words is "seventy-eight million, six hundred thirty-two thousand, four hundred twenty-five".