51115603964 has 12 divisors (see below), whose sum is σ = 90712199088. Its totient is φ = 25197832800.

The previous prime is 51115603963. The next prime is 51115603997. The reversal of 51115603964 is 46930651115.

It is a super-2 number, since 2×51115603964² (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 (51115603963) 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, 89991977 + ... + 89992544.

It is an arithmetic number, because the mean of its divisors is an integer number (7559349924).

Almost surely, 2^51115603964 is an apocalyptic number.

It is an amenable number.

51115603964 is a deficient number, since it is larger than the sum of its proper divisors (39596595124).

51115603964 is a wasteful number, since it uses less digits than its factorization.

51115603964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179984596 (or 179984594 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 51115603964 in words is "fifty-one billion, one hundred fifteen million, six hundred three thousand, nine hundred sixty-four".