51553022236440 has 32 divisors (see below), whose sum is σ = 154659066709680. Its totient is φ = 13747472596352.

The previous prime is 51553022236423. The next prime is 51553022236487. The reversal of 51553022236440 is 4463222035515.

It is a junction number, because it is equal to n+sod(n) for n = 51553022236392 and 51553022236401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214804259199 + ... + 214804259438.

Almost surely, 2^{51553022236440} is an apocalyptic number.

It is an amenable number.

51553022236440 is an abundant number, since it is smaller than the sum of its proper divisors (103106044473240).

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

51553022236440 is a wasteful number, since it uses less digits than its factorization.

51553022236440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429608518651 (or 429608518647 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 51553022236440 in words is "fifty-one trillion, five hundred fifty-three billion, twenty-two million, two hundred thirty-six thousand, four hundred forty".