51306409717 has 16 divisors (see below), whose sum is σ = 55993652352. Its totient is φ = 46821035520.

The previous prime is 51306409711. The next prime is 51306409807. The reversal of 51306409717 is 71790460315.

It is not a de Polignac number, because 51306409717 - 2¹⁵ = 51306376949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51306409711) 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, 156009 + ... + 356302.

It is an arithmetic number, because the mean of its divisors is an integer number (3499603272).

Almost surely, 2^51306409717 is an apocalyptic number.

It is an amenable number.

51306409717 is a deficient number, since it is larger than the sum of its proper divisors (4687242635).

51306409717 is a wasteful number, since it uses less digits than its factorization.

51306409717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512508.

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 51306409717 in words is "fifty-one billion, three hundred six million, four hundred nine thousand, seven hundred seventeen".