51505605016 has 16 divisors (see below), whose sum is σ = 96836156640. Its totient is φ = 25682629920.

The previous prime is 51505604971. The next prime is 51505605031. The reversal of 51505605016 is 61050650515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8768455 + ... + 8774326.

It is an arithmetic number, because the mean of its divisors is an integer number (6052259790).

Almost surely, 2^51505605016 is an apocalyptic number.

It is an amenable number.

51505605016 is a deficient number, since it is larger than the sum of its proper divisors (45330551624).

51505605016 is a wasteful number, since it uses less digits than its factorization.

51505605016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17543154 (or 17543150 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 51505605016 in words is "fifty-one billion, five hundred five million, six hundred five thousand, sixteen".