55401436337720 has 128 divisors (see below), whose sum is σ = 142040100579840. Its totient is φ = 19250733258240.

The previous prime is 55401436337699. The next prime is 55401436337831. The reversal of 55401436337720 is 2773363410455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7344179 + ... + 12835101.

It is an arithmetic number, because the mean of its divisors is an integer number (1109688285780).

Almost surely, 2^{55401436337720} 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 55401436337720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71020050289920).

55401436337720 is an abundant number, since it is smaller than the sum of its proper divisors (86638664242120).

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

55401436337720 is a wasteful number, since it uses less digits than its factorization.

55401436337720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491965 (or 5491961 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 50.

The spelling of 55401436337720 in words is "fifty-five trillion, four hundred one billion, four hundred thirty-six million, three hundred thirty-seven thousand, seven hundred twenty".