55111272400 has 60 divisors (see below), whose sum is σ = 132427399104. Its totient is φ = 22040752000.

The previous prime is 55111272383. The next prime is 55111272427. The reversal of 55111272400 is 427211155.

55111272400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4582395 + ... + 4594405.

Almost surely, 2^55111272400 is an apocalyptic number.

55111272400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55111272400 is an abundant number, since it is smaller than the sum of its proper divisors (77316126704).

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

55111272400 is a wasteful number, since it uses less digits than its factorization.

55111272400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23500 (or 23489 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 55111272400 its reverse (427211155), we get a palindrome (55538483555).

The spelling of 55111272400 in words is "fifty-five billion, one hundred eleven million, two hundred seventy-two thousand, four hundred".