681467435616 has 96 divisors (see below), whose sum is σ = 1978960709376. Its totient is φ = 203596736000.

The previous prime is 681467435549. The next prime is 681467435617. The reversal of 681467435616 is 616534764186.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681467435617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4469595 + ... + 4619546.

It is an arithmetic number, because the mean of its divisors is an integer number (20614174056).

Almost surely, 2^681467435616 is an apocalyptic number.

681467435616 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

681467435616 is an abundant number, since it is smaller than the sum of its proper divisors (1297493273760).

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

681467435616 is a wasteful number, since it uses less digits than its factorization.

681467435616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9089236 (or 9089228 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 57.

The spelling of 681467435616 in words is "six hundred eighty-one billion, four hundred sixty-seven million, four hundred thirty-five thousand, six hundred sixteen".