51123531604 has 12 divisors (see below), whose sum is σ = 89472980800. Its totient is φ = 25559822808.

The previous prime is 51123531587. The next prime is 51123531607. The reversal of 51123531604 is 40613532115.

It is a super-2 number, since 2×51123531604² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123531607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425724 + ... + 532435.

Almost surely, 2^51123531604 is an apocalyptic number.

It is an amenable number.

51123531604 is a deficient number, since it is larger than the sum of its proper divisors (38349449196).

51123531604 is a wasteful number, since it uses less digits than its factorization.

51123531604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971502 (or 971500 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 51123531604 in words is "fifty-one billion, one hundred twenty-three million, five hundred thirty-one thousand, six hundred four".