521432953860 has 192 divisors, whose sum is σ = 1830843689472. Its totient is φ = 107940777984.

The previous prime is 521432953837. The next prime is 521432953861. The reversal of 521432953860 is 68359234125.

It is not an unprimeable number, because it can be changed into a prime (521432953861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 611569 + ... + 1190328.

It is an arithmetic number, because the mean of its divisors is an integer number (9535644216).

Almost surely, 2^521432953860 is an apocalyptic number.

It is an amenable number.

521432953860 is an abundant number, since it is smaller than the sum of its proper divisors (1309410735612).

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

521432953860 is a wasteful number, since it uses less digits than its factorization.

521432953860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801982 (or 1801980 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

It can be divided in two parts, 52143 and 2953860, that added together give a palindrome (3006003).

The spelling of 521432953860 in words is "five hundred twenty-one billion, four hundred thirty-two million, nine hundred fifty-three thousand, eight hundred sixty".