655550525656139 has 2 divisors, whose sum is σ = 655550525656140. Its totient is φ = 655550525656138.

The previous prime is 655550525656031. The next prime is 655550525656283. The reversal of 655550525656139 is 931656525055556.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655550525656139 is a prime.

It is not a weakly prime, because it can be changed into another prime (655550525658139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327775262828069 + 327775262828070.

It is an arithmetic number, because the mean of its divisors is an integer number (327775262828070).

Almost surely, 2^{655550525656139} is an apocalyptic number.

655550525656139 is a deficient number, since it is larger than the sum of its proper divisors (1).

655550525656139 is an equidigital number, since it uses as much as digits as its factorization.

655550525656139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 911250000, while the sum is 68.

The spelling of 655550525656139 in words is "six hundred fifty-five trillion, five hundred fifty billion, five hundred twenty-five million, six hundred fifty-six thousand, one hundred thirty-nine".