3915601948891 has 2 divisors, whose sum is σ = 3915601948892. Its totient is φ = 3915601948890.

The previous prime is 3915601948883. The next prime is 3915601948949. The reversal of 3915601948891 is 1988491065193.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3915601948891 - 2³ = 3915601948883 is a prime.

It is a super-2 number, since 2×3915601948891² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3915601946891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957800974445 + 1957800974446.

It is an arithmetic number, because the mean of its divisors is an integer number (1957800974446).

Almost surely, 2^{3915601948891} is an apocalyptic number.

3915601948891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3915601948891 is an equidigital number, since it uses as much as digits as its factorization.

3915601948891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 64.

The spelling of 3915601948891 in words is "three trillion, nine hundred fifteen billion, six hundred one million, nine hundred forty-eight thousand, eight hundred ninety-one".