51465402275861 has 16 divisors (see below), whose sum is σ = 61683306240000. Its totient is φ = 41983200257328.

The previous prime is 51465402275857. The next prime is 51465402275869. The reversal of 51465402275861 is 16857220456415.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51465402275861 - 2² = 51465402275857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51465402275797 and 51465402275806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51465402275869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803136011 + ... + 803200088.

It is an arithmetic number, because the mean of its divisors is an integer number (3855206640000).

Almost surely, 2^{51465402275861} is an apocalyptic number.

It is an amenable number.

51465402275861 is a deficient number, since it is larger than the sum of its proper divisors (10217903964139).

51465402275861 is a wasteful number, since it uses less digits than its factorization.

51465402275861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606336328.

The product of its (nonzero) digits is 16128000, while the sum is 56.

The spelling of 51465402275861 in words is "fifty-one trillion, four hundred sixty-five billion, four hundred two million, two hundred seventy-five thousand, eight hundred sixty-one".