115531909277 has 2 divisors, whose sum is σ = 115531909278. Its totient is φ = 115531909276.

The previous prime is 115531909193. The next prime is 115531909303. The reversal of 115531909277 is 772909135511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112291339801 + 3240569476 = 335099^2 + 56926^2 .

It is an emirp because it is prime and its reverse (772909135511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115531909277 - 2²⁶ = 115464800413 is a prime.

It is a super-2 number, since 2×115531909277² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115531909777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57765954638 + 57765954639.

It is an arithmetic number, because the mean of its divisors is an integer number (57765954639).

Almost surely, 2^115531909277 is an apocalyptic number.

It is an amenable number.

115531909277 is a deficient number, since it is larger than the sum of its proper divisors (1).

115531909277 is an equidigital number, since it uses as much as digits as its factorization.

115531909277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 595350, while the sum is 50.

The spelling of 115531909277 in words is "one hundred fifteen billion, five hundred thirty-one million, nine hundred nine thousand, two hundred seventy-seven".