3972178615 has 16 divisors (see below), whose sum is σ = 4833303552. Its totient is φ = 3133522944.

The previous prime is 3972178603. The next prime is 3972178643. The reversal of 3972178615 is 5168712793.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3972178615 - 2⁷ = 3972178487 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119562 + ... + 149128.

It is an arithmetic number, because the mean of its divisors is an integer number (302081472).

Almost surely, 2^3972178615 is an apocalyptic number.

3972178615 is a deficient number, since it is larger than the sum of its proper divisors (861124937).

3972178615 is a wasteful number, since it uses less digits than its factorization.

3972178615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29946.

The product of its digits is 635040, while the sum is 49.

The square root of 3972178615 is about 63025.2220543490. Note that the first 3 decimals coincide. The cubic root of 3972178615 is about 1583.7121782537.

It can be divided in two parts, 3972178 and 615, that added together give a palindrome (3972793).

The spelling of 3972178615 in words is "three billion, nine hundred seventy-two million, one hundred seventy-eight thousand, six hundred fifteen".