55651398639424 has 504 divisors, whose sum is σ = 139529466432000. Its totient is φ = 21947591393280.

The previous prime is 55651398639409. The next prime is 55651398639439. The reversal of 55651398639424 is 42493689315655.

It is an interprime number because it is at equal distance from previous prime (55651398639409) and next prime (55651398639439).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10213137052 + ... + 10213142500.

Almost surely, 2^{55651398639424} 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 55651398639424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69764733216000).

55651398639424 is an abundant number, since it is smaller than the sum of its proper divisors (83878067792576).

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

55651398639424 is a wasteful number, since it uses less digits than its factorization.

55651398639424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5759 (or 5725 counting only the distinct ones).

The product of its digits is 839808000, while the sum is 70.

The spelling of 55651398639424 in words is "fifty-five trillion, six hundred fifty-one billion, three hundred ninety-eight million, six hundred thirty-nine thousand, four hundred twenty-four".