3765978655 has 8 divisors (see below), whose sum is σ = 4593259584. Its totient is φ = 2963392800.

The previous prime is 3765978647. The next prime is 3765978701. The reversal of 3765978655 is 5568795673.

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

It is not a de Polignac number, because 3765978655 - 2³ = 3765978647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3765978593 and 3765978602.

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, 6173431 + ... + 6174040.

It is an arithmetic number, because the mean of its divisors is an integer number (574157448).

Almost surely, 2^3765978655 is an apocalyptic number.

3765978655 is a deficient number, since it is larger than the sum of its proper divisors (827280929).

3765978655 is a wasteful number, since it uses less digits than its factorization.

3765978655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12347537.

The product of its digits is 47628000, while the sum is 61.

The square root of 3765978655 is about 61367.5700594377. The cubic root of 3765978655 is about 1555.8197660615.

The spelling of 3765978655 in words is "three billion, seven hundred sixty-five million, nine hundred seventy-eight thousand, six hundred fifty-five".