51571725397719 has 8 divisors (see below), whose sum is σ = 68769599400432. Its totient is φ = 34377500830080.

The previous prime is 51571725397691. The next prime is 51571725397789. The reversal of 51571725397719 is 91779352717515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51571725397719 - 2⁹ = 51571725397207 is a prime.

It is a super-2 number, since 2×51571725397719² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51571725397789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912325794 + ... + 912382319.

It is an arithmetic number, because the mean of its divisors is an integer number (8596199925054).

Almost surely, 2^{51571725397719} is an apocalyptic number.

51571725397719 is a deficient number, since it is larger than the sum of its proper divisors (17197874002713).

51571725397719 is a wasteful number, since it uses less digits than its factorization.

51571725397719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824717537.

The product of its digits is 145860750, while the sum is 69.

The spelling of 51571725397719 in words is "fifty-one trillion, five hundred seventy-one billion, seven hundred twenty-five million, three hundred ninety-seven thousand, seven hundred nineteen".