191880314255569 has 9 divisors (see below), whose sum is σ = 192102078738843. Its totient is φ = 191658805532352.

The previous prime is 191880314255521. The next prime is 191880314255593. The reversal of 191880314255569 is 965552413088191.

The square root of 191880314255569 is 13852087.

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

It can be written as a sum of positive squares in only one way, i.e., 92493132502225 + 99387181753344 = 9617335^2 + 9969312^2 .

It is not a de Polignac number, because 191880314255569 - 2²⁹ = 191879777384657 is a prime.

It is a super-2 number, since 2×191880314255569² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191880314255869) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12730060417 + ... + 12730075489.

It is an arithmetic number, because the mean of its divisors is an integer number (21344675415427).

Almost surely, 2^{191880314255569} is an apocalyptic number.

191880314255569 is the 13852087-th square number.

191880314255569 is the 6926044-th centered octagonal number.

It is an amenable number.

191880314255569 is a deficient number, since it is larger than the sum of its proper divisors (221764483274).

191880314255569 is an frugal number, since it uses more digits than its factorization.

191880314255569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31984 (or 15992 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 67.

The spelling of 191880314255569 in words is "one hundred ninety-one trillion, eight hundred eighty billion, three hundred fourteen million, two hundred fifty-five thousand, five hundred sixty-nine".