521143389914742 has 48 divisors (see below), whose sum is σ = 1334948585012640. Its totient is φ = 143763693768576.

The previous prime is 521143389914701. The next prime is 521143389914801. The reversal of 521143389914742 is 247419983341125.

521143389914742 is a `hidden beast` number, since 5 + 2 + 1 + 1 + 43 + 38 + 9 + 91 + 474 + 2 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 521143389914742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71311352383 + ... + 71311359690.

It is an arithmetic number, because the mean of its divisors is an integer number (27811428854430).

Almost surely, 2^{521143389914742} is an apocalyptic number.

521143389914742 is an abundant number, since it is smaller than the sum of its proper divisors (813805195097898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521143389914742 is a wasteful number, since it uses less digits than its factorization.

521143389914742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142622712117 (or 142622712114 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 521143389914742 in words is "five hundred twenty-one trillion, one hundred forty-three billion, three hundred eighty-nine million, nine hundred fourteen thousand, seven hundred forty-two".