781385384344 has 8 divisors (see below), whose sum is σ = 1465097595660. Its totient is φ = 390692692168.

The previous prime is 781385384231. The next prime is 781385384399. The reversal of 781385384344 is 443483583187.

781385384344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×781385384344² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48836586514 + ... + 48836586529.

Almost surely, 2^781385384344 is an apocalyptic number.

It is an amenable number.

781385384344 is a deficient number, since it is larger than the sum of its proper divisors (683712211316).

781385384344 is a wasteful number, since it uses less digits than its factorization.

781385384344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97673173049 (or 97673173045 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 58.

The spelling of 781385384344 in words is "seven hundred eighty-one billion, three hundred eighty-five million, three hundred eighty-four thousand, three hundred forty-four".