3981374771455 has 4 divisors (see below), whose sum is σ = 4777649725752. Its totient is φ = 3185099817160.

The previous prime is 3981374771449. The next prime is 3981374771477. The reversal of 3981374771455 is 5541774731893.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3981374771455 - 2¹⁵ = 3981374738687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398137477141 + ... + 398137477150.

It is an arithmetic number, because the mean of its divisors is an integer number (1194412431438).

Almost surely, 2^{3981374771455} is an apocalyptic number.

3981374771455 is a deficient number, since it is larger than the sum of its proper divisors (796274954297).

3981374771455 is an equidigital number, since it uses as much as digits as its factorization.

3981374771455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796274954296.

The product of its digits is 88905600, while the sum is 64.

The spelling of 3981374771455 in words is "three trillion, nine hundred eighty-one billion, three hundred seventy-four million, seven hundred seventy-one thousand, four hundred fifty-five".