55156121700 has 36 divisors (see below), whose sum is σ = 159585046320. Its totient is φ = 14708299040.

The previous prime is 55156121659. The next prime is 55156121719. The reversal of 55156121700 is 712165155.

It is a happy number.

55156121700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 91926570 + ... + 91927169.

Almost surely, 2^55156121700 is an apocalyptic number.

55156121700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55156121700 is an abundant number, since it is smaller than the sum of its proper divisors (104428924620).

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

55156121700 is a wasteful number, since it uses less digits than its factorization.

55156121700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183853756 (or 183853749 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 33.

Adding to 55156121700 its reverse (712165155), we get a palindrome (55868286855).

The spelling of 55156121700 in words is "fifty-five billion, one hundred fifty-six million, one hundred twenty-one thousand, seven hundred".