55433431326 has 128 divisors (see below), whose sum is σ = 145120066560. Its totient is φ = 13698680832.

The previous prime is 55433431321. The next prime is 55433431337. The reversal of 55433431326 is 62313433455.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55433431321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2093860 + ... + 2120168.

It is an arithmetic number, because the mean of its divisors is an integer number (1133750520).

Almost surely, 2^55433431326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55433431326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72560033280).

55433431326 is an abundant number, since it is smaller than the sum of its proper divisors (89686635234).

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

55433431326 is a wasteful number, since it uses less digits than its factorization.

55433431326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26578.

The product of its digits is 388800, while the sum is 39.

The spelling of 55433431326 in words is "fifty-five billion, four hundred thirty-three million, four hundred thirty-one thousand, three hundred twenty-six".