51876579765 has 16 divisors (see below), whose sum is σ = 83039455296. Its totient is φ = 27655200000.

The previous prime is 51876579761. The next prime is 51876579809. The reversal of 51876579765 is 56797567815.

It is a happy number.

It is not a de Polignac number, because 51876579765 - 2² = 51876579761 is a prime.

It is a super-2 number, since 2×51876579765² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51876579696 and 51876579705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51876579761) 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, 734436 + ... + 801965.

It is an arithmetic number, because the mean of its divisors is an integer number (5189965956).

Almost surely, 2^51876579765 is an apocalyptic number.

It is an amenable number.

51876579765 is a deficient number, since it is larger than the sum of its proper divisors (31162875531).

51876579765 is a wasteful number, since it uses less digits than its factorization.

51876579765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538660.

The product of its digits is 111132000, while the sum is 66.

The spelling of 51876579765 in words is "fifty-one billion, eight hundred seventy-six million, five hundred seventy-nine thousand, seven hundred sixty-five".