3945742315881 has 16 divisors (see below), whose sum is σ = 5422407103488. Its totient is φ = 2550292214400.

The previous prime is 3945742315871. The next prime is 3945742315883. The reversal of 3945742315881 is 1885132475493.

It is not a de Polignac number, because 3945742315881 - 2¹⁵ = 3945742283113 is a prime.

It is a super-2 number, since 2×3945742315881² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3945742315883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63220105 + ... + 63282486.

It is an arithmetic number, because the mean of its divisors is an integer number (338900443968).

Almost surely, 2^{3945742315881} is an apocalyptic number.

It is an amenable number.

3945742315881 is a deficient number, since it is larger than the sum of its proper divisors (1476664787607).

3945742315881 is a wasteful number, since it uses less digits than its factorization.

3945742315881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126502912.

The product of its digits is 29030400, while the sum is 60.

The spelling of 3945742315881 in words is "three trillion, nine hundred forty-five billion, seven hundred forty-two million, three hundred fifteen thousand, eight hundred eighty-one".