3872139870815 has 8 divisors (see below), whose sum is σ = 4666510197648. Its totient is φ = 3084416994880.

The previous prime is 3872139870779. The next prime is 3872139870827. The reversal of 3872139870815 is 5180789312783.

3872139870815 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3872139870815 - 2²² = 3872135676511 is a prime.

It is a Duffinian number.

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, 1661861441 + ... + 1661863770.

It is an arithmetic number, because the mean of its divisors is an integer number (583313774706).

Almost surely, 2^{3872139870815} is an apocalyptic number.

3872139870815 is a deficient number, since it is larger than the sum of its proper divisors (794370326833).

3872139870815 is a wasteful number, since it uses less digits than its factorization.

3872139870815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323725449.

The product of its (nonzero) digits is 20321280, while the sum is 62.

The spelling of 3872139870815 in words is "three trillion, eight hundred seventy-two billion, one hundred thirty-nine million, eight hundred seventy thousand, eight hundred fifteen".