345443681640 has 64 divisors (see below), whose sum is σ = 1064340005760. Its totient is φ = 89628629760.

The previous prime is 345443681629. The next prime is 345443681641. The reversal of 345443681640 is 46186344543.

It is a self number, because there is not a number n which added to its sum of digits gives 345443681640.

It is not an unprimeable number, because it can be changed into a prime (345443681641) 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, 38896876 + ... + 38905755.

It is an arithmetic number, because the mean of its divisors is an integer number (16630312590).

Almost surely, 2^345443681640 is an apocalyptic number.

345443681640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

345443681640 is an abundant number, since it is smaller than the sum of its proper divisors (718896324120).

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

345443681640 is a wasteful number, since it uses less digits than its factorization.

345443681640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77802682 (or 77802678 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 345443681640 in words is "three hundred forty-five billion, four hundred forty-three million, six hundred eighty-one thousand, six hundred forty".