3891419715961 has 4 divisors (see below), whose sum is σ = 3949500607312. Its totient is φ = 3833338824612.

The previous prime is 3891419715941. The next prime is 3891419715973. The reversal of 3891419715961 is 1695179141983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3891419715961 - 2²⁵ = 3891386161529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3891419715893 and 3891419715902.

It is not an unprimeable number, because it can be changed into a prime (3891419715901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29040445575 + ... + 29040445708.

It is an arithmetic number, because the mean of its divisors is an integer number (987375151828).

Almost surely, 2^{3891419715961} is an apocalyptic number.

3891419715961 is the 1138921-st hex number.

It is an amenable number.

3891419715961 is a deficient number, since it is larger than the sum of its proper divisors (58080891351).

3891419715961 is an equidigital number, since it uses as much as digits as its factorization.

3891419715961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58080891350.

The product of its digits is 14696640, while the sum is 64.

The spelling of 3891419715961 in words is "three trillion, eight hundred ninety-one billion, four hundred nineteen million, seven hundred fifteen thousand, nine hundred sixty-one".