55998749729 has 8 divisors (see below), whose sum is σ = 60322950912. Its totient is φ = 51676920720.

The previous prime is 55998749693. The next prime is 55998749777. The reversal of 55998749729 is 92794789955.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55998749729 - 2²⁸ = 55730314273 is a prime.

It is a super-2 number, since 2×55998749729² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55998742729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543857 + ... + 638574.

It is an arithmetic number, because the mean of its divisors is an integer number (7540368864).

Almost surely, 2^55998749729 is an apocalyptic number.

It is an amenable number.

55998749729 is a deficient number, since it is larger than the sum of its proper divisors (4324201183).

55998749729 is a wasteful number, since it uses less digits than its factorization.

55998749729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186087.

The product of its digits is 514382400, while the sum is 74.

The spelling of 55998749729 in words is "fifty-five billion, nine hundred ninety-eight million, seven hundred forty-nine thousand, seven hundred twenty-nine".