3905916945 has 64 divisors (see below), whose sum is σ = 7289243136. Its totient is φ = 1749196800.

The previous prime is 3905916943. The next prime is 3905916953. The reversal of 3905916945 is 5496195093.

It is not a de Polignac number, because 3905916945 - 2¹ = 3905916943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3905916941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1026787 + ... + 1030583.

It is an arithmetic number, because the mean of its divisors is an integer number (113894424).

Almost surely, 2^3905916945 is an apocalyptic number.

3905916945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3905916945 is a deficient number, since it is larger than the sum of its proper divisors (3383326191).

3905916945 is a wasteful number, since it uses less digits than its factorization.

3905916945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010.

The product of its (nonzero) digits is 1312200, while the sum is 51.

The square root of 3905916945 is about 62497.3355032037. The cubic root of 3905916945 is about 1574.8565513092.

The spelling of 3905916945 in words is "three billion, nine hundred five million, nine hundred sixteen thousand, nine hundred forty-five".