1655625582551 has 2 divisors, whose sum is σ = 1655625582552. Its totient is φ = 1655625582550.

The previous prime is 1655625582521. The next prime is 1655625582553. The reversal of 1655625582551 is 1552855265561.

It is a strong prime.

It is an emirp because it is prime and its reverse (1552855265561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1655625582551 - 2⁶ = 1655625582487 is a prime.

Together with 1655625582553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655625582553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827812791275 + 827812791276.

It is an arithmetic number, because the mean of its divisors is an integer number (827812791276).

Almost surely, 2^{1655625582551} is an apocalyptic number.

1655625582551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655625582551 is an equidigital number, since it uses as much as digits as its factorization.

1655625582551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000000, while the sum is 56.

The spelling of 1655625582551 in words is "one trillion, six hundred fifty-five billion, six hundred twenty-five million, five hundred eighty-two thousand, five hundred fifty-one".