1655918198731 has 2 divisors, whose sum is σ = 1655918198732. Its totient is φ = 1655918198730.

The previous prime is 1655918198717. The next prime is 1655918198741. The reversal of 1655918198731 is 1378918195561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1655918198731 - 2⁹ = 1655918198219 is a prime.

It is a super-2 number, since 2×1655918198731² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1655918198741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827959099365 + 827959099366.

It is an arithmetic number, because the mean of its divisors is an integer number (827959099366).

Almost surely, 2^{1655918198731} is an apocalyptic number.

1655918198731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655918198731 is an equidigital number, since it uses as much as digits as its factorization.

1655918198731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 64.

The spelling of 1655918198731 in words is "one trillion, six hundred fifty-five billion, nine hundred eighteen million, one hundred ninety-eight thousand, seven hundred thirty-one".