51282812613 has 4 divisors (see below), whose sum is σ = 68377083488. Its totient is φ = 34188541740.

The previous prime is 51282812597. The next prime is 51282812617. The reversal of 51282812613 is 31621828215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51282812613 - 2⁴ = 51282812597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51282812617) 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, 8547135433 + ... + 8547135438.

It is an arithmetic number, because the mean of its divisors is an integer number (17094270872).

Almost surely, 2^51282812613 is an apocalyptic number.

It is an amenable number.

51282812613 is a deficient number, since it is larger than the sum of its proper divisors (17094270875).

51282812613 is a wasteful number, since it uses less digits than its factorization.

51282812613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17094270874.

The product of its digits is 46080, while the sum is 39.

The spelling of 51282812613 in words is "fifty-one billion, two hundred eighty-two million, eight hundred twelve thousand, six hundred thirteen".