3857883785520 has 40 divisors (see below), whose sum is σ = 11959439735856. Its totient is φ = 1028769009408.

The previous prime is 3857883785507. The next prime is 3857883785537. The reversal of 3857883785520 is 255873887583.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8037257647 + ... + 8037258126.

Almost surely, 2^{3857883785520} is an apocalyptic number.

3857883785520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3857883785520 is an abundant number, since it is smaller than the sum of its proper divisors (8101555950336).

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

3857883785520 is a wasteful number, since it uses less digits than its factorization.

3857883785520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16074515789 (or 16074515783 counting only the distinct ones).

The product of its (nonzero) digits is 451584000, while the sum is 69.

The spelling of 3857883785520 in words is "three trillion, eight hundred fifty-seven billion, eight hundred eighty-three million, seven hundred eighty-five thousand, five hundred twenty".