51013666579 has 4 divisors (see below), whose sum is σ = 52772758560. Its totient is φ = 49254574600.

The previous prime is 51013666553. The next prime is 51013666607. The reversal of 51013666579 is 97566631015.

51013666579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51013666579 - 2¹³ = 51013658387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51013666679) 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, 879545947 + ... + 879546004.

It is an arithmetic number, because the mean of its divisors is an integer number (13193189640).

Almost surely, 2^51013666579 is an apocalyptic number.

51013666579 is a deficient number, since it is larger than the sum of its proper divisors (1759091981).

51013666579 is a wasteful number, since it uses less digits than its factorization.

51013666579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759091980.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 51013666579 in words is "fifty-one billion, thirteen million, six hundred sixty-six thousand, five hundred seventy-nine".