55198154172 has 96 divisors (see below), whose sum is σ = 151384730112. Its totient is φ = 15325744896.

The previous prime is 55198154147. The next prime is 55198154173. The reversal of 55198154172 is 27145189155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55198154173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 672778 + ... + 750350.

It is an arithmetic number, because the mean of its divisors is an integer number (1576924272).

Almost surely, 2^55198154172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55198154172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75692365056).

55198154172 is an abundant number, since it is smaller than the sum of its proper divisors (96186575940).

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

55198154172 is a wasteful number, since it uses less digits than its factorization.

55198154172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77827 (or 77825 counting only the distinct ones).

The product of its digits is 504000, while the sum is 48.

The spelling of 55198154172 in words is "fifty-five billion, one hundred ninety-eight million, one hundred fifty-four thousand, one hundred seventy-two".