51618956 has 24 divisors (see below), whose sum is σ = 93744000. Its totient is φ = 24840704.

The previous prime is 51618949. The next prime is 51618967. The reversal of 51618956 is 65981615.

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 7 ways as a sum of consecutive naturals, for example, 55100 + ... + 56028.

It is an arithmetic number, because the mean of its divisors is an integer number (3906000).

Almost surely, 2^51618956 is an apocalyptic number.

It is an amenable number.

51618956 is a deficient number, since it is larger than the sum of its proper divisors (42125044).

51618956 is a wasteful number, since it uses less digits than its factorization.

51618956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441 (or 1439 counting only the distinct ones).

The product of its digits is 64800, while the sum is 41.

The square root of 51618956 is about 7184.6333239769. The cubic root of 51618956 is about 372.3371803171.

The spelling of 51618956 in words is "fifty-one million, six hundred eighteen thousand, nine hundred fifty-six".