3977117765 has 8 divisors (see below), whose sum is σ = 4799204640. Its totient is φ = 3163918672.

The previous prime is 3977117747. The next prime is 3977117779. The reversal of 3977117765 is 5677117793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3977117765 - 2⁶ = 3977117701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220959 + ... + 2222748.

It is an arithmetic number, because the mean of its divisors is an integer number (599900580).

Almost surely, 2^3977117765 is an apocalyptic number.

It is an amenable number.

3977117765 is a deficient number, since it is larger than the sum of its proper divisors (822086875).

3977117765 is a wasteful number, since it uses less digits than its factorization.

3977117765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443891.

The product of its digits is 1944810, while the sum is 53.

The square root of 3977117765 is about 63064.3937971341. The cubic root of 3977117765 is about 1584.3683212984.

The spelling of 3977117765 in words is "three billion, nine hundred seventy-seven million, one hundred seventeen thousand, seven hundred sixty-five".