1655616040079 has 2 divisors, whose sum is σ = 1655616040080. Its totient is φ = 1655616040078.

The previous prime is 1655616039989. The next prime is 1655616040109. The reversal of 1655616040079 is 9700406165561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1655616040079 - 2²⁸ = 1655347604623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655616040579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827808020039 + 827808020040.

It is an arithmetic number, because the mean of its divisors is an integer number (827808020040).

Almost surely, 2^{1655616040079} is an apocalyptic number.

1655616040079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655616040079 is an equidigital number, since it uses as much as digits as its factorization.

1655616040079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 1655616040079 in words is "one trillion, six hundred fifty-five billion, six hundred sixteen million, forty thousand, seventy-nine".