521643116422 has 32 divisors (see below), whose sum is σ = 806087160000. Its totient is φ = 252991807488.

The previous prime is 521643116387. The next prime is 521643116447. The reversal of 521643116422 is 224611346125.

It is a super-2 number, since 2×521643116422² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43287454 + ... + 43299502.

It is an arithmetic number, because the mean of its divisors is an integer number (25190223750).

Almost surely, 2^521643116422 is an apocalyptic number.

521643116422 is a deficient number, since it is larger than the sum of its proper divisors (284444043578).

521643116422 is a wasteful number, since it uses less digits than its factorization.

521643116422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13840.

The product of its digits is 69120, while the sum is 37.

The spelling of 521643116422 in words is "five hundred twenty-one billion, six hundred forty-three million, one hundred sixteen thousand, four hundred twenty-two".