51978604 has 18 divisors (see below), whose sum is σ = 95865980. Its totient is φ = 24591672.

The previous prime is 51978559. The next prime is 51978617. The reversal of 51978604 is 40687915.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 62439 + ... + 63265.

Almost surely, 2^51978604 is an apocalyptic number.

It is an amenable number.

51978604 is a deficient number, since it is larger than the sum of its proper divisors (43887376).

51978604 is an equidigital number, since it uses as much as digits as its factorization.

51978604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 51978604 is about 7209.6188526163. The cubic root of 51978604 is about 373.1999158327.

The spelling of 51978604 in words is "fifty-one million, nine hundred seventy-eight thousand, six hundred four".