55998749731 has 4 divisors (see below), whose sum is σ = 56123469000. Its totient is φ = 55874030464.

The previous prime is 55998749693. The next prime is 55998749777. The reversal of 55998749731 is 13794789955.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13794789955 = 5 ⋅2758957991.

It is a cyclic number.

It is not a de Polignac number, because 55998749731 - 2²⁹ = 55461878819 is a prime.

It is a super-2 number, since 2×55998749731² (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 (55998740731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62358961 + ... + 62359858.

It is an arithmetic number, because the mean of its divisors is an integer number (14030867250).

Almost surely, 2^55998749731 is an apocalyptic number.

55998749731 is a deficient number, since it is larger than the sum of its proper divisors (124719269).

55998749731 is a wasteful number, since it uses less digits than its factorization.

55998749731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124719268.

The product of its digits is 85730400, while the sum is 67.

The spelling of 55998749731 in words is "fifty-five billion, nine hundred ninety-eight million, seven hundred forty-nine thousand, seven hundred thirty-one".