51002216646 has 32 divisors (see below), whose sum is σ = 104563651680. Its totient is φ = 16579436544.

The previous prime is 51002216621. The next prime is 51002216651. The reversal of 51002216646 is 64661220015.

It is a super-2 number, since 2×51002216646² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615195 + ... + 693158.

It is an arithmetic number, because the mean of its divisors is an integer number (3267614115).

Almost surely, 2^51002216646 is an apocalyptic number.

51002216646 is an abundant number, since it is smaller than the sum of its proper divisors (53561435034).

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

51002216646 is a wasteful number, since it uses less digits than its factorization.

51002216646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308520.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 51002216646 in words is "fifty-one billion, two million, two hundred sixteen thousand, six hundred forty-six".