3977747948511 has 16 divisors (see below), whose sum is σ = 5893085632000. Its totient is φ = 2651775396984.

The previous prime is 3977747948491. The next prime is 3977747948513. The reversal of 3977747948511 is 1158497477793.

It is a happy number.

3977747948511 is a `hidden beast` number, since 3 + 9 + 7 + 7 + 74 + 79 + 485 + 1 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-3977747948511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3977747948511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977747948513) 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, 262381 + ... + 2832726.

It is an arithmetic number, because the mean of its divisors is an integer number (368317852000).

Almost surely, 2^{3977747948511} is an apocalyptic number.

3977747948511 is a deficient number, since it is larger than the sum of its proper divisors (1915337683489).

3977747948511 is a wasteful number, since it uses less digits than its factorization.

3977747948511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142715 (or 3142709 counting only the distinct ones).

The product of its digits is 373403520, while the sum is 72.

The spelling of 3977747948511 in words is "three trillion, nine hundred seventy-seven billion, seven hundred forty-seven million, nine hundred forty-eight thousand, five hundred eleven".