55390137600 has 864 divisors, whose sum is σ = 223041280000. Its totient is φ = 11824496640.

The previous prime is 55390137587. The next prime is 55390137601. The reversal of 55390137600 is 673109355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55390137601) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 278342301 + ... + 278342499.

Almost surely, 2^55390137600 is an apocalyptic number.

55390137600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55390137600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111520640000).

55390137600 is an abundant number, since it is smaller than the sum of its proper divisors (167651142400).

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

55390137600 is a wasteful number, since it uses less digits than its factorization.

55390137600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 39.

The spelling of 55390137600 in words is "fifty-five billion, three hundred ninety million, one hundred thirty-seven thousand, six hundred".