55390137599 has 4 divisors (see below), whose sum is σ = 55455074136. Its totient is φ = 55325201064.

The previous prime is 55390137587. The next prime is 55390137601. The reversal of 55390137599 is 99573109355.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55390137599 - 2¹² = 55390133503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55390134599) 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, 32466989 + ... + 32468694.

It is an arithmetic number, because the mean of its divisors is an integer number (13863768534).

Almost surely, 2^55390137599 is an apocalyptic number.

55390137599 is a deficient number, since it is larger than the sum of its proper divisors (64936537).

55390137599 is an equidigital number, since it uses as much as digits as its factorization.

55390137599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64936536.

The product of its (nonzero) digits is 5740875, while the sum is 56.

The spelling of 55390137599 in words is "fifty-five billion, three hundred ninety million, one hundred thirty-seven thousand, five hundred ninety-nine".