115919417820 has 24 divisors (see below), whose sum is σ = 324574370064. Its totient is φ = 30911844736.

The previous prime is 115919417813. The next prime is 115919417851. The reversal of 115919417820 is 28714919511.

It is a super-2 number, since 2×115919417820² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115919417820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965995089 + ... + 965995208.

It is an arithmetic number, because the mean of its divisors is an integer number (13523932086).

Almost surely, 2^115919417820 is an apocalyptic number.

115919417820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115919417820 is an abundant number, since it is smaller than the sum of its proper divisors (208654952244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115919417820 is a wasteful number, since it uses less digits than its factorization.

115919417820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931990309 (or 1931990307 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 48.

The spelling of 115919417820 in words is "one hundred fifteen billion, nine hundred nineteen million, four hundred seventeen thousand, eight hundred twenty".