51017201616 has 20 divisors (see below), whose sum is σ = 131794437632. Its totient is φ = 17005733856.

The previous prime is 51017201539. The next prime is 51017201617. The reversal of 51017201616 is 61610271015.

It is a super-2 number, since 2×51017201616² (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 (51017201617) 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, 531429136 + ... + 531429231.

Almost surely, 2^51017201616 is an apocalyptic number.

It is an amenable number.

51017201616 is an abundant number, since it is smaller than the sum of its proper divisors (80777236016).

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

51017201616 is a wasteful number, since it uses less digits than its factorization.

51017201616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062858378 (or 1062858372 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The spelling of 51017201616 in words is "fifty-one billion, seventeen million, two hundred one thousand, six hundred sixteen".