3891400678180 has 12 divisors (see below), whose sum is σ = 8171941424220. Its totient is φ = 1556560271264.

The previous prime is 3891400678157. The next prime is 3891400678279. The reversal of 3891400678180 is 818760041983.

It can be written as a sum of positive squares in 2 ways, for example, as 719945462016 + 3171455216164 = 848496^2 + 1780858^2 .

It is a super-2 number, since 2×3891400678180² (a number of 26 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 97285016935 + ... + 97285016974.

It is an arithmetic number, because the mean of its divisors is an integer number (680995118685).

Almost surely, 2^{3891400678180} is an apocalyptic number.

It is an amenable number.

3891400678180 is an abundant number, since it is smaller than the sum of its proper divisors (4280540746040).

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

3891400678180 is a wasteful number, since it uses less digits than its factorization.

3891400678180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194570033918 (or 194570033916 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 3891400678180 in words is "three trillion, eight hundred ninety-one billion, four hundred million, six hundred seventy-eight thousand, one hundred eighty".