3914157681 has 96 divisors (see below), whose sum is σ = 7331020800. Its totient is φ = 2050181280.

The previous prime is 3914157679. The next prime is 3914157721. The reversal of 3914157681 is 1867514193.

3914157681 is a `hidden beast` number, since 3 + 91 + 415 + 76 + 81 = 666.

It is not a de Polignac number, because 3914157681 - 2¹ = 3914157679 is a prime.

It is a super-2 number, since 2×3914157681² = 30641260703462595522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3914157661) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 776736 + ... + 781758.

It is an arithmetic number, because the mean of its divisors is an integer number (76364800).

Almost surely, 2^3914157681 is an apocalyptic number.

3914157681 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3914157681 is a deficient number, since it is larger than the sum of its proper divisors (3416863119).

3914157681 is a wasteful number, since it uses less digits than its factorization.

3914157681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5096 (or 5083 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 3914157681 is about 62563.2294642788. The cubic root of 3914157681 is about 1575.9633217917.

The spelling of 3914157681 in words is "three billion, nine hundred fourteen million, one hundred fifty-seven thousand, six hundred eighty-one".