51037615717 has 12 divisors (see below), whose sum is σ = 56508698988. Its totient is φ = 46059147200.

The previous prime is 51037615691. The next prime is 51037615801. The reversal of 51037615717 is 71751673015.

It can be written as a sum of positive squares in 2 ways, for example, as 27301283361 + 23736332356 = 165231^2 + 154066^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51037615717 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 (51037615817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1522834 + ... + 1555987.

It is an arithmetic number, because the mean of its divisors is an integer number (4709058249).

Almost surely, 2^51037615717 is an apocalyptic number.

It is an amenable number.

51037615717 is a deficient number, since it is larger than the sum of its proper divisors (5471083271).

51037615717 is a wasteful number, since it uses less digits than its factorization.

51037615717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078980 (or 3078969 counting only the distinct ones).

The product of its (nonzero) digits is 154350, while the sum is 43.

The spelling of 51037615717 in words is "fifty-one billion, thirty-seven million, six hundred fifteen thousand, seven hundred seventeen".