51463558440 has 128 divisors (see below), whose sum is σ = 196051680000. Its totient is φ = 11763097344.

The previous prime is 51463558411. The next prime is 51463558457. The reversal of 51463558440 is 4485536415.

51463558440 is a `hidden beast` number, since 5 + 1 + 4 + 63 + 5 + 584 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3396115 + ... + 3411234.

It is an arithmetic number, because the mean of its divisors is an integer number (1531653750).

Almost surely, 2^51463558440 is an apocalyptic number.

It is an amenable number.

51463558440 is an abundant number, since it is smaller than the sum of its proper divisors (144588121560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51463558440 is a wasteful number, since it uses less digits than its factorization.

51463558440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6807376 (or 6807366 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 51463558440 in words is "fifty-one billion, four hundred sixty-three million, five hundred fifty-eight thousand, four hundred forty".