3938725621495 has 32 divisors (see below), whose sum is σ = 5636718738432. Its totient is φ = 2583329075712.

The previous prime is 3938725621469. The next prime is 3938725621507. The reversal of 3938725621495 is 5941265278393.

It is a happy number.

It is not a de Polignac number, because 3938725621495 - 2¹¹ = 3938725619447 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 31 ways as a sum of consecutive naturals, for example, 33907384 + ... + 34023346.

It is an arithmetic number, because the mean of its divisors is an integer number (176147460576).

Almost surely, 2^{3938725621495} is an apocalyptic number.

3938725621495 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3938725621495 is a deficient number, since it is larger than the sum of its proper divisors (1697993116937).

3938725621495 is a wasteful number, since it uses less digits than its factorization.

3938725621495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158191.

The product of its digits is 97977600, while the sum is 64.

The spelling of 3938725621495 in words is "three trillion, nine hundred thirty-eight billion, seven hundred twenty-five million, six hundred twenty-one thousand, four hundred ninety-five".