55890307709 has 16 divisors (see below), whose sum is σ = 58890594240. Its totient is φ = 52984753920.

The previous prime is 55890307673. The next prime is 55890307747. The reversal of 55890307709 is 90770309855.

It is a happy number.

55890307709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55890307709 - 2²⁰ = 55889259133 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 (55890307909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133394 + ... + 359964.

It is an arithmetic number, because the mean of its divisors is an integer number (3680662140).

Almost surely, 2^55890307709 is an apocalyptic number.

55890307709 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

55890307709 is a deficient number, since it is larger than the sum of its proper divisors (3000286531).

55890307709 is a wasteful number, since it uses less digits than its factorization.

55890307709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226780.

The product of its (nonzero) digits is 2381400, while the sum is 53.

The spelling of 55890307709 in words is "fifty-five billion, eight hundred ninety million, three hundred seven thousand, seven hundred nine".