3981537379712 has 16 divisors (see below), whose sum is σ = 7931968998900. Its totient is φ = 1990768689792.

The previous prime is 3981537379709. The next prime is 3981537379741. The reversal of 3981537379712 is 2179737351893.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15552880262 + ... + 15552880517.

Almost surely, 2^{3981537379712} is an apocalyptic number.

3981537379712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3981537379712 is a deficient number, since it is larger than the sum of its proper divisors (3950431619188).

3981537379712 is an equidigital number, since it uses as much as digits as its factorization.

3981537379712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31105760793 (or 31105760781 counting only the distinct ones).

The product of its digits is 60011280, while the sum is 65.

The spelling of 3981537379712 in words is "three trillion, nine hundred eighty-one billion, five hundred thirty-seven million, three hundred seventy-nine thousand, seven hundred twelve".