320675258640 has 80 divisors (see below), whose sum is σ = 1084465429056. Its totient is φ = 77739456000.

The previous prime is 320675258587. The next prime is 320675258641. The reversal of 320675258640 is 46852576023.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 320675258640.

It is not an unprimeable number, because it can be changed into a prime (320675258641) 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, 60731311 + ... + 60736590.

Almost surely, 2^320675258640 is an apocalyptic number.

320675258640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320675258640 is an abundant number, since it is smaller than the sum of its proper divisors (763790170416).

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

320675258640 is a wasteful number, since it uses less digits than its factorization.

320675258640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121467928 (or 121467922 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 320675258640 in words is "three hundred twenty billion, six hundred seventy-five million, two hundred fifty-eight thousand, six hundred forty".