54196812891 has 24 divisors (see below), whose sum is σ = 85735082160. Its totient is φ = 32786594496.

The previous prime is 54196812883. The next prime is 54196812919. The reversal of 54196812891 is 19821869145.

54196812891 is a `hidden beast` number, since 541 + 9 + 6 + 8 + 1 + 2 + 8 + 91 = 666.

It is not a de Polignac number, because 54196812891 - 2³ = 54196812883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54196811891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3918696 + ... + 3932501.

It is an arithmetic number, because the mean of its divisors is an integer number (3572295090).

Almost surely, 2^54196812891 is an apocalyptic number.

54196812891 is a deficient number, since it is larger than the sum of its proper divisors (31538269269).

54196812891 is a wasteful number, since it uses less digits than its factorization.

54196812891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7851275 (or 7851272 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The spelling of 54196812891 in words is "fifty-four billion, one hundred ninety-six million, eight hundred twelve thousand, eight hundred ninety-one".