346640669840 has 40 divisors (see below), whose sum is σ = 813919175928. Its totient is φ = 137283430400.

The previous prime is 346640669831. The next prime is 346640669857. The reversal of 346640669840 is 48966046643.

It can be written as a sum of positive squares in 4 ways, for example, as 92656924816 + 253983745024 = 304396^2 + 503968^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21442457 + ... + 21458616.

Almost surely, 2^346640669840 is an apocalyptic number.

It is an amenable number.

346640669840 is an abundant number, since it is smaller than the sum of its proper divisors (467278506088).

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

346640669840 is a wasteful number, since it uses less digits than its factorization.

346640669840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42901187 (or 42901181 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 56.

The spelling of 346640669840 in words is "three hundred forty-six billion, six hundred forty million, six hundred sixty-nine thousand, eight hundred forty".