3621981174 has 16 divisors (see below), whose sum is σ = 8278814208. Its totient is φ = 1034851752.

The previous prime is 3621981173. The next prime is 3621981217. The reversal of 3621981174 is 4711891263.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 86237647 = 3621981174 / (3 + 6 + 2 + 1 + 9 + 8 + 1 + 1 + 7 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621981173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43118782 + ... + 43118865.

It is an arithmetic number, because the mean of its divisors is an integer number (517425888).

Almost surely, 2^3621981174 is an apocalyptic number.

3621981174 is an abundant number, since it is smaller than the sum of its proper divisors (4656833034).

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

3621981174 is a wasteful number, since it uses less digits than its factorization.

3621981174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86237659.

The product of its digits is 72576, while the sum is 42.

The square root of 3621981174 is about 60182.8976869675. The cubic root of 3621981174 is about 1535.7318672924.

The spelling of 3621981174 in words is "three billion, six hundred twenty-one million, nine hundred eighty-one thousand, one hundred seventy-four".