891156516093 has 6 divisors (see below), whose sum is σ = 1287226078814. Its totient is φ = 594104344056.

The previous prime is 891156516071. The next prime is 891156516101. The reversal of 891156516093 is 390615651198.

891156516093 is a `hidden beast` number, since 8 + 9 + 11 + 565 + 1 + 60 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 873800561529 + 17355954564 = 934773^2 + 131742^2 .

It is not a de Polignac number, because 891156516093 - 2³⁶ = 822437039357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891156516043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49508695330 + ... + 49508695347.

Almost surely, 2^891156516093 is an apocalyptic number.

It is an amenable number.

891156516093 is a deficient number, since it is larger than the sum of its proper divisors (396069562721).

891156516093 is a wasteful number, since it uses less digits than its factorization.

891156516093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99017390683 (or 99017390680 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 891156516093 in words is "eight hundred ninety-one billion, one hundred fifty-six million, five hundred sixteen thousand, ninety-three".