461686968520 has 32 divisors (see below), whose sum is σ = 1038818691000. Its totient is φ = 184670696448.

The previous prime is 461686968427. The next prime is 461686968571. The reversal of 461686968520 is 25869686164.

It can be written as a sum of positive squares in 4 ways, for example, as 454003744804 + 7683223716 = 673798^2 + 87654^2 .

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, 2243392 + ... + 2440528.

Almost surely, 2^461686968520 is an apocalyptic number.

461686968520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

461686968520 is an abundant number, since it is smaller than the sum of its proper divisors (577131722480).

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

461686968520 is a wasteful number, since it uses less digits than its factorization.

461686968520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255697 (or 255693 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 461686968520 in words is "four hundred sixty-one billion, six hundred eighty-six million, nine hundred sixty-eight thousand, five hundred twenty".