3556391394690 has 48 divisors (see below), whose sum is σ = 9246754415808. Its totient is φ = 948357008928.

The previous prime is 3556391394649. The next prime is 3556391394701. The reversal of 3556391394690 is 964931936553.

It is a happy number.

3556391394690 is a `hidden beast` number, since 3 + 5 + 5 + 6 + 39 + 139 + 469 + 0 = 666.

It is a super-2 number, since 2×3556391394690² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6767349 + ... + 7273911.

It is an arithmetic number, because the mean of its divisors is an integer number (192640716996).

Almost surely, 2^{3556391394690} is an apocalyptic number.

3556391394690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3556391394690 is an abundant number, since it is smaller than the sum of its proper divisors (5690363021118).

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

3556391394690 is a wasteful number, since it uses less digits than its factorization.

3556391394690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584583 (or 584580 counting only the distinct ones).

The product of its (nonzero) digits is 70858800, while the sum is 63.

It can be divided in two parts, 355639 and 1394690, that added together give a square (1750329 = 1323²).

The spelling of 3556391394690 in words is "three trillion, five hundred fifty-six billion, three hundred ninety-one million, three hundred ninety-four thousand, six hundred ninety".