191056502537761 has 27 divisors (see below), whose sum is σ = 223166751856497. Its totient is φ = 163089541881000.

The previous prime is 191056502537743. The next prime is 191056502537827. The reversal of 191056502537761 is 167735205650191.

The square root of 191056502537761 is 13822319.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 191056502537761 - 2¹⁷ = 191056502406689 is a prime.

It is a super-2 number, since 2×191056502537761² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191056502537696 and 191056502537705.

It is not an unprimeable number, because it can be changed into a prime (191056502537711) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 24285810550 + ... + 24285818416.

Almost surely, 2^{191056502537761} is an apocalyptic number.

191056502537761 is the 13822319-th square number.

191056502537761 is the 6911160-th centered octagonal number.

It is an amenable number.

191056502537761 is a deficient number, since it is larger than the sum of its proper divisors (32110249318736).

191056502537761 is an frugal number, since it uses more digits than its factorization.

191056502537761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16250 (or 8125 counting only the distinct ones).

The product of its (nonzero) digits is 11907000, while the sum is 58.

The spelling of 191056502537761 in words is "one hundred ninety-one trillion, fifty-six billion, five hundred two million, five hundred thirty-seven thousand, seven hundred sixty-one".