115520421993 has 16 divisors (see below), whose sum is σ = 157860304896. Its totient is φ = 75108658320.

The previous prime is 115520421977. The next prime is 115520422007. The reversal of 115520421993 is 399124025511.

It is not a de Polignac number, because 115520421993 - 2⁴ = 115520421977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115520421923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1407613 + ... + 1487418.

It is an arithmetic number, because the mean of its divisors is an integer number (9866269056).

Almost surely, 2^115520421993 is an apocalyptic number.

It is an amenable number.

115520421993 is a deficient number, since it is larger than the sum of its proper divisors (42339882903).

115520421993 is a wasteful number, since it uses less digits than its factorization.

115520421993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895364.

The product of its (nonzero) digits is 97200, while the sum is 42.

The spelling of 115520421993 in words is "one hundred fifteen billion, five hundred twenty million, four hundred twenty-one thousand, nine hundred ninety-three".