55518883687 has 2 divisors, whose sum is σ = 55518883688. Its totient is φ = 55518883686.

The previous prime is 55518883639. The next prime is 55518883699. The reversal of 55518883687 is 78638881555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55518883687 - 2³¹ = 53371400039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55518833687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27759441843 + 27759441844.

It is an arithmetic number, because the mean of its divisors is an integer number (27759441844).

Almost surely, 2^55518883687 is an apocalyptic number.

55518883687 is a deficient number, since it is larger than the sum of its proper divisors (1).

55518883687 is an equidigital number, since it uses as much as digits as its factorization.

55518883687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512000, while the sum is 64.

The spelling of 55518883687 in words is "fifty-five billion, five hundred eighteen million, eight hundred eighty-three thousand, six hundred eighty-seven".