538570551091 has 12 divisors (see below), whose sum is σ = 576097911928. Its totient is φ = 503174083104.

The previous prime is 538570551061. The next prime is 538570551119. The reversal of 538570551091 is 190155075835.

It is not a de Polignac number, because 538570551091 - 2⁹ = 538570550579 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538570551061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11815530 + ... + 11861023.

Almost surely, 2^538570551091 is an apocalyptic number.

538570551091 is a deficient number, since it is larger than the sum of its proper divisors (37527360837).

538570551091 is a wasteful number, since it uses less digits than its factorization.

538570551091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23676642 (or 23676619 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 49.

The spelling of 538570551091 in words is "five hundred thirty-eight billion, five hundred seventy million, five hundred fifty-one thousand, ninety-one".