51665016555610 has 64 divisors (see below), whose sum is σ = 93460079881728. Its totient is φ = 20563389000000.

The previous prime is 51665016555553. The next prime is 51665016555611. The reversal of 51665016555610 is 1655561056615.

It is not an unprimeable number, because it can be changed into a prime (51665016555611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4217201985 + ... + 4217214235.

It is an arithmetic number, because the mean of its divisors is an integer number (1460313748152).

Almost surely, 2^{51665016555610} is an apocalyptic number.

51665016555610 is a deficient number, since it is larger than the sum of its proper divisors (41795063326118).

51665016555610 is a wasteful number, since it uses less digits than its factorization.

51665016555610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14971.

The product of its (nonzero) digits is 4050000, while the sum is 52.

The spelling of 51665016555610 in words is "fifty-one trillion, six hundred sixty-five billion, sixteen million, five hundred fifty-five thousand, six hundred ten".