51419581791 has 16 divisors (see below), whose sum is σ = 69028544640. Its totient is φ = 34045466400.

The previous prime is 51419581771. The next prime is 51419581813. The reversal of 51419581791 is 19718591415.

It is not a de Polignac number, because 51419581791 - 2⁶ = 51419581727 is a prime.

It is a super-2 number, since 2×51419581791² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51419581771) 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, 673305 + ... + 745773.

It is an arithmetic number, because the mean of its divisors is an integer number (4314284040).

Almost surely, 2^51419581791 is an apocalyptic number.

51419581791 is a deficient number, since it is larger than the sum of its proper divisors (17608962849).

51419581791 is a wasteful number, since it uses less digits than its factorization.

51419581791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74086.

The product of its digits is 453600, while the sum is 51.

The spelling of 51419581791 in words is "fifty-one billion, four hundred nineteen million, five hundred eighty-one thousand, seven hundred ninety-one".