115519489977 has 4 divisors (see below), whose sum is σ = 154025986640. Its totient is φ = 77012993316.

The previous prime is 115519489973. The next prime is 115519489993. The reversal of 115519489977 is 779984915511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 779984915511 = 3 ⋅259994971837.

It is not a de Polignac number, because 115519489977 - 2² = 115519489973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115519489973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19253248327 + ... + 19253248332.

It is an arithmetic number, because the mean of its divisors is an integer number (38506496660).

Almost surely, 2^115519489977 is an apocalyptic number.

It is an amenable number.

115519489977 is a deficient number, since it is larger than the sum of its proper divisors (38506496663).

115519489977 is an equidigital number, since it uses as much as digits as its factorization.

115519489977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38506496662.

The product of its digits is 28576800, while the sum is 66.

The spelling of 115519489977 in words is "one hundred fifteen billion, five hundred nineteen million, four hundred eighty-nine thousand, nine hundred seventy-seven".