51161530436651 has 4 divisors (see below), whose sum is σ = 51171607560192. Its totient is φ = 51151453313112.

The previous prime is 51161530436641. The next prime is 51161530436657. The reversal of 51161530436651 is 15663403516115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51161530436651 - 2³⁸ = 50886652529707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51161530436596 and 51161530436605.

It is not an unprimeable number, because it can be changed into a prime (51161530436657) 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, 5038554155 + ... + 5038564308.

It is an arithmetic number, because the mean of its divisors is an integer number (12792901890048).

Almost surely, 2^{51161530436651} is an apocalyptic number.

51161530436651 is a deficient number, since it is larger than the sum of its proper divisors (10077123541).

51161530436651 is a wasteful number, since it uses less digits than its factorization.

51161530436651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077123540.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 51161530436651 in words is "fifty-one trillion, one hundred sixty-one billion, five hundred thirty million, four hundred thirty-six thousand, six hundred fifty-one".