3934215681 has 16 divisors (see below), whose sum is σ = 5727203328. Its totient is φ = 2382411600.

The previous prime is 3934215643. The next prime is 3934215683. The reversal of 3934215681 is 1865124393.

It is not a de Polignac number, because 3934215681 - 2⁶ = 3934215617 is a prime.

It is a super-2 number, since 2×3934215681² = 30956106049252587522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3934215683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7801 + ... + 89046.

It is an arithmetic number, because the mean of its divisors is an integer number (357950208).

Almost surely, 2^3934215681 is an apocalyptic number.

It is an amenable number.

3934215681 is a deficient number, since it is larger than the sum of its proper divisors (1792987647).

3934215681 is a wasteful number, since it uses less digits than its factorization.

3934215681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98092.

The product of its digits is 155520, while the sum is 42.

The square root of 3934215681 is about 62723.3264503725. The cubic root of 3934215681 is about 1578.6507309403.

The spelling of 3934215681 in words is "three billion, nine hundred thirty-four million, two hundred fifteen thousand, six hundred eighty-one".