51061111660488 has 32 divisors (see below), whose sum is σ = 127653207564960. Its totient is φ = 17020313431680.

The previous prime is 51061111660477. The next prime is 51061111660499. The reversal of 51061111660488 is 88406611116015.

It is an interprime number because it is at equal distance from previous prime (51061111660477) and next prime (51061111660499).

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, 4063131 + ... + 10891797.

It is an arithmetic number, because the mean of its divisors is an integer number (3989162736405).

Almost surely, 2^{51061111660488} is an apocalyptic number.

It is an amenable number.

51061111660488 is an abundant number, since it is smaller than the sum of its proper divisors (76592095904472).

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

51061111660488 is a wasteful number, since it uses less digits than its factorization.

51061111660488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7140237 (or 7140233 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 48.

The spelling of 51061111660488 in words is "fifty-one trillion, sixty-one billion, one hundred eleven million, six hundred sixty thousand, four hundred eighty-eight".