115621644146 has 4 divisors (see below), whose sum is σ = 173432466222. Its totient is φ = 57810822072.

The previous prime is 115621644143. The next prime is 115621644191. The reversal of 115621644146 is 641446126511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641446126511 = 313 ⋅2049348647.

It can be written as a sum of positive squares in only one way, i.e., 93275878921 + 22345765225 = 305411^2 + 149485^2 .

It is not an unprimeable number, because it can be changed into a prime (115621644143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28905411035 + ... + 28905411038.

Almost surely, 2^115621644146 is an apocalyptic number.

115621644146 is a deficient number, since it is larger than the sum of its proper divisors (57810822076).

115621644146 is an equidigital number, since it uses as much as digits as its factorization.

115621644146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57810822075.

The product of its digits is 138240, while the sum is 41.

The spelling of 115621644146 in words is "one hundred fifteen billion, six hundred twenty-one million, six hundred forty-four thousand, one hundred forty-six".