51130661640641 has 8 divisors (see below), whose sum is σ = 55885964849568. Its totient is φ = 46393201972000.

The previous prime is 51130661640623. The next prime is 51130661640673. The reversal of 51130661640641 is 14604616603115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51130661640641 - 2³⁸ = 50855783733697 is a prime.

It is a super-2 number, since 2×51130661640641² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51130661640592 and 51130661640601.

It is not an unprimeable number, because it can be changed into a prime (51130661643641) 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, 4460879075 + ... + 4460890536.

It is an arithmetic number, because the mean of its divisors is an integer number (6985745606196).

Almost surely, 2^{51130661640641} is an apocalyptic number.

It is an amenable number.

51130661640641 is a deficient number, since it is larger than the sum of its proper divisors (4755303208927).

51130661640641 is a wasteful number, since it uses less digits than its factorization.

51130661640641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8921770143.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 51130661640641 in words is "fifty-one trillion, one hundred thirty billion, six hundred sixty-one million, six hundred forty thousand, six hundred forty-one".