55139018496 has 144 divisors (see below), whose sum is σ = 153971478528. Its totient is φ = 17494732800.

The previous prime is 55139018483. The next prime is 55139018497. The reversal of 55139018496 is 69481093155.

It is a super-2 number, since 2×55139018496² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55139018497) 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, 1433305 + ... + 1471271.

Almost surely, 2^55139018496 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 55139018496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76985739264).

55139018496 is an abundant number, since it is smaller than the sum of its proper divisors (98832460032).

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

55139018496 is a wasteful number, since it uses less digits than its factorization.

55139018496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38078 (or 38064 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 55139018496 in words is "fifty-five billion, one hundred thirty-nine million, eighteen thousand, four hundred ninety-six".