55605277639 has 16 divisors (see below), whose sum is σ = 57060177408. Its totient is φ = 54170911872.

The previous prime is 55605277631. The next prime is 55605277657. The reversal of 55605277639 is 93677250655.

It is a cyclic number.

It is not a de Polignac number, because 55605277639 - 2³ = 55605277631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55605277639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55605277631) 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, 3527794 + ... + 3543520.

It is an arithmetic number, because the mean of its divisors is an integer number (3566261088).

Almost surely, 2^55605277639 is an apocalyptic number.

55605277639 is a deficient number, since it is larger than the sum of its proper divisors (1454899769).

55605277639 is a wasteful number, since it uses less digits than its factorization.

55605277639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16374.

The product of its (nonzero) digits is 11907000, while the sum is 55.

The spelling of 55605277639 in words is "fifty-five billion, six hundred five million, two hundred seventy-seven thousand, six hundred thirty-nine".