51565531550402 has 16 divisors (see below), whose sum is σ = 81422835394560. Its totient is φ = 24424705587312.

The previous prime is 51565531550399. The next prime is 51565531550419. The reversal of 51565531550402 is 20405513556515.

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, 28914953 + ... + 30646460.

It is an arithmetic number, because the mean of its divisors is an integer number (5088927212160).

Almost surely, 2^{51565531550402} is an apocalyptic number.

51565531550402 is a deficient number, since it is larger than the sum of its proper divisors (29857303844158).

51565531550402 is a wasteful number, since it uses less digits than its factorization.

51565531550402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59584217.

The product of its (nonzero) digits is 2250000, while the sum is 47.

The spelling of 51565531550402 in words is "fifty-one trillion, five hundred sixty-five billion, five hundred thirty-one million, five hundred fifty thousand, four hundred two".