521712669998 has 16 divisors (see below), whose sum is σ = 851454940560. Its totient is φ = 238308086016.

The previous prime is 521712669967. The next prime is 521712670019. The reversal of 521712669998 is 899966217125.

It is a super-2 number, since 2×521712669998² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103429808 + ... + 103434851.

It is an arithmetic number, because the mean of its divisors is an integer number (53215933785).

Almost surely, 2^521712669998 is an apocalyptic number.

521712669998 is a deficient number, since it is larger than the sum of its proper divisors (329742270562).

521712669998 is a wasteful number, since it uses less digits than its factorization.

521712669998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206864771.

The product of its digits is 29393280, while the sum is 65.

The spelling of 521712669998 in words is "five hundred twenty-one billion, seven hundred twelve million, six hundred sixty-nine thousand, nine hundred ninety-eight".