55498694689440 has 576 divisors, whose sum is σ = 199708284851712. Its totient is φ = 14550849331200.

The previous prime is 55498694689439. The next prime is 55498694689481. The reversal of 55498694689440 is 4498649689455.

55498694689440 is a `hidden beast` number, since 5 + 5 + 4 + 9 + 8 + 6 + 94 + 6 + 89 + 440 = 666.

It is a super-2 number, since 2×55498694689440² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 55498694689440.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9066929580 + ... + 9066935700.

It is an arithmetic number, because the mean of its divisors is an integer number (346715772312).

Almost surely, 2^{55498694689440} 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 55498694689440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99854142425856).

55498694689440 is an abundant number, since it is smaller than the sum of its proper divisors (144209590162272).

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

55498694689440 is a wasteful number, since it uses less digits than its factorization.

55498694689440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035 (or 10015 counting only the distinct ones).

The product of its (nonzero) digits is 10749542400, while the sum is 81.

The spelling of 55498694689440 in words is "fifty-five trillion, four hundred ninety-eight billion, six hundred ninety-four million, six hundred eighty-nine thousand, four hundred forty".