55506655639 has 2 divisors, whose sum is σ = 55506655640. Its totient is φ = 55506655638.

The previous prime is 55506655571. The next prime is 55506655643. The reversal of 55506655639 is 93655660555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55506655639 - 2³⁵ = 21146917271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55506655639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55506655669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27753327819 + 27753327820.

It is an arithmetic number, because the mean of its divisors is an integer number (27753327820).

Almost surely, 2^55506655639 is an apocalyptic number.

55506655639 is a deficient number, since it is larger than the sum of its proper divisors (1).

55506655639 is an equidigital number, since it uses as much as digits as its factorization.

55506655639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18225000, while the sum is 55.

The spelling of 55506655639 in words is "fifty-five billion, five hundred six million, six hundred fifty-five thousand, six hundred thirty-nine".