51142620662161 has 8 divisors (see below), whose sum is σ = 59641540131200. Its totient is φ = 43836531995844.

The previous prime is 51142620662101. The next prime is 51142620662197. The reversal of 51142620662161 is 16126602624115.

It is not a de Polignac number, because 51142620662161 - 2³³ = 51134030727569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51142620662101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74551924821 + ... + 74551925506.

It is an arithmetic number, because the mean of its divisors is an integer number (7455192516400).

Almost surely, 2^{51142620662161} is an apocalyptic number.

It is an amenable number.

51142620662161 is a deficient number, since it is larger than the sum of its proper divisors (8498919469039).

51142620662161 is an equidigital number, since it uses as much as digits as its factorization.

51142620662161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149103850348 (or 149103850334 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 51142620662161 in words is "fifty-one trillion, one hundred forty-two billion, six hundred twenty million, six hundred sixty-two thousand, one hundred sixty-one".