521646045546 has 32 divisors (see below), whose sum is σ = 1079685158400. Its totient is φ = 167821142720.

The previous prime is 521646045539. The next prime is 521646045563. The reversal of 521646045546 is 645540646125.

It is a happy number.

It is a super-2 number, since 2×521646045546² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521646045495 and 521646045504.

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, 127701 + ... + 1029368.

It is an arithmetic number, because the mean of its divisors is an integer number (33740161200).

Almost surely, 2^521646045546 is an apocalyptic number.

521646045546 is an abundant number, since it is smaller than the sum of its proper divisors (558039112854).

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

521646045546 is a wasteful number, since it uses less digits than its factorization.

521646045546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159694.

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 521646045546 in words is "five hundred twenty-one billion, six hundred forty-six million, forty-five thousand, five hundred forty-six".