55773781100 has 18 divisors (see below), whose sum is σ = 121029105204. Its totient is φ = 22309512400.

The previous prime is 55773781087. The next prime is 55773781109. The reversal of 55773781100 is 118737755.

55773781100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55773781100² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55773781109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278868806 + ... + 278869005.

It is an arithmetic number, because the mean of its divisors is an integer number (6723839178).

Almost surely, 2^55773781100 is an apocalyptic number.

55773781100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55773781100 is an abundant number, since it is smaller than the sum of its proper divisors (65255324104).

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

55773781100 is a wasteful number, since it uses less digits than its factorization.

55773781100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557737825 (or 557737818 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 44.

The spelling of 55773781100 in words is "fifty-five billion, seven hundred seventy-three million, seven hundred eighty-one thousand, one hundred".