68473933920 has 144 divisors (see below), whose sum is σ = 267048381600. Its totient is φ = 15651182592.

The previous prime is 68473933907. The next prime is 68473933933. The reversal of 68473933920 is 2933937486.

68473933920 is a `hidden beast` number, since 68 + 473 + 93 + 3 + 9 + 20 = 666.

68473933920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (68473933907) and next prime (68473933933).

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3386445 + ... + 3406604.

It is an arithmetic number, because the mean of its divisors is an integer number (1854502650).

Almost surely, 2^68473933920 is an apocalyptic number.

68473933920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68473933920 is an abundant number, since it is smaller than the sum of its proper divisors (198574447680).

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

68473933920 is a wasteful number, since it uses less digits than its factorization.

68473933920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6793077 (or 6793066 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 68473933920 in words is "sixty-eight billion, four hundred seventy-three million, nine hundred thirty-three thousand, nine hundred twenty".