3791938221972 has 18 divisors (see below), whose sum is σ = 9585177172298. Its totient is φ = 1263979407312.

The previous prime is 3791938221923. The next prime is 3791938222019. The reversal of 3791938221972 is 2791228391973.

3791938221972 is a `hidden beast` number, since 37 + 9 + 1 + 9 + 382 + 219 + 7 + 2 = 666.

3791938221972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3720902113296 + 71036108676 = 1928964^2 + 266526^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52665808603 + ... + 52665808674.

Almost surely, 2^{3791938221972} is an apocalyptic number.

It is an amenable number.

3791938221972 is an abundant number, since it is smaller than the sum of its proper divisors (5793238950326).

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

3791938221972 is a wasteful number, since it uses less digits than its factorization.

3791938221972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105331617287 (or 105331617282 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The spelling of 3791938221972 in words is "three trillion, seven hundred ninety-one billion, nine hundred thirty-eight million, two hundred twenty-one thousand, nine hundred seventy-two".