51665501156156 has 6 divisors (see below), whose sum is σ = 90414627023280. Its totient is φ = 25832750578076.

The previous prime is 51665501156153. The next prime is 51665501156177. The reversal of 51665501156156 is 65165110556615.

It is a junction number, because it is equal to n+sod(n) for n = 51665501156098 and 51665501156107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51665501156153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6458187644516 + ... + 6458187644523.

It is an arithmetic number, because the mean of its divisors is an integer number (15069104503880).

Almost surely, 2^{51665501156156} is an apocalyptic number.

It is an amenable number.

51665501156156 is a deficient number, since it is larger than the sum of its proper divisors (38749125867124).

51665501156156 is a wasteful number, since it uses less digits than its factorization.

51665501156156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12916375289043 (or 12916375289041 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 53.

The spelling of 51665501156156 in words is "fifty-one trillion, six hundred sixty-five billion, five hundred one million, one hundred fifty-six thousand, one hundred fifty-six".