115773781420 has 48 divisors (see below), whose sum is σ = 265302084096. Its totient is φ = 42087672000.

The previous prime is 115773781393. The next prime is 115773781421. The reversal of 115773781420 is 24187377511.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (115773781421) 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, 726355 + ... + 871285.

It is an arithmetic number, because the mean of its divisors is an integer number (5527126752).

Almost surely, 2^115773781420 is an apocalyptic number.

115773781420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115773781420 is an abundant number, since it is smaller than the sum of its proper divisors (149528302676).

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

115773781420 is a wasteful number, since it uses less digits than its factorization.

115773781420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148582 (or 148580 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 115773781420 in words is "one hundred fifteen billion, seven hundred seventy-three million, seven hundred eighty-one thousand, four hundred twenty".