681364474506 has 32 divisors (see below), whose sum is σ = 1514875348800. Its totient is φ = 227011680720.

The previous prime is 681364474499. The next prime is 681364474507. The reversal of 681364474506 is 605474463186.

681364474506 is a `hidden beast` number, since 6 + 8 + 1 + 3 + 64 + 4 + 74 + 506 = 666.

681364474506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (681364474507) 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, 2937540 + ... + 3160991.

It is an arithmetic number, because the mean of its divisors is an integer number (47339854650).

Almost surely, 2^681364474506 is an apocalyptic number.

681364474506 is an abundant number, since it is smaller than the sum of its proper divisors (833510874294).

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

681364474506 is a wasteful number, since it uses less digits than its factorization.

681364474506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100611 (or 6100605 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 681364474506 in words is "six hundred eighty-one billion, three hundred sixty-four million, four hundred seventy-four thousand, five hundred six".