115557520642 has 4 divisors (see below), whose sum is σ = 173336280966. Its totient is φ = 57778760320.

The previous prime is 115557520583. The next prime is 115557520657. The reversal of 115557520642 is 246025755511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246025755511 = 53 ⋅4641995387.

It can be written as a sum of positive squares in only one way, i.e., 113192546481 + 2364974161 = 336441^2 + 48631^2 .

It is an unprimeable number.

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, 28889380159 + ... + 28889380162.

Almost surely, 2^115557520642 is an apocalyptic number.

115557520642 is a deficient number, since it is larger than the sum of its proper divisors (57778760324).

115557520642 is an equidigital number, since it uses as much as digits as its factorization.

115557520642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57778760323.

The product of its (nonzero) digits is 420000, while the sum is 43.

The spelling of 115557520642 in words is "one hundred fifteen billion, five hundred fifty-seven million, five hundred twenty thousand, six hundred forty-two".