681435516 has 24 divisors (see below), whose sum is σ = 1623847680. Its totient is φ = 222312112.

The previous prime is 681435511. The next prime is 681435553. The reversal of 681435516 is 615534186.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681435511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603546 + ... + 604673.

It is an arithmetic number, because the mean of its divisors is an integer number (67660320).

Almost surely, 2^681435516 is an apocalyptic number.

It is an amenable number.

681435516 is an abundant number, since it is smaller than the sum of its proper divisors (942412164).

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

681435516 is a wasteful number, since it uses less digits than its factorization.

681435516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208273 (or 1208271 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 681435516 is about 26104.3198723889. The cubic root of 681435516 is about 879.9842955186.

The spelling of 681435516 in words is "six hundred eighty-one million, four hundred thirty-five thousand, five hundred sixteen".