3972712155 has 32 divisors (see below), whose sum is σ = 6582325248. Its totient is φ = 2043888000.

The previous prime is 3972712151. The next prime is 3972712171. The reversal of 3972712155 is 5512172793.

It is not a de Polignac number, because 3972712155 - 2² = 3972712151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3972712151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133930 + ... + 160880.

It is an arithmetic number, because the mean of its divisors is an integer number (205697664).

Almost surely, 2^3972712155 is an apocalyptic number.

3972712155 is a deficient number, since it is larger than the sum of its proper divisors (2609613093).

3972712155 is a wasteful number, since it uses less digits than its factorization.

3972712155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27307.

The product of its digits is 132300, while the sum is 42.

The square root of 3972712155 is about 63029.4546620864. The cubic root of 3972712155 is about 1583.7830827496.

The spelling of 3972712155 in words is "three billion, nine hundred seventy-two million, seven hundred twelve thousand, one hundred fifty-five".