1655743440431 has 2 divisors, whose sum is σ = 1655743440432. Its totient is φ = 1655743440430.

The previous prime is 1655743440389. The next prime is 1655743440443. The reversal of 1655743440431 is 1340443475561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1655743440431 is a prime.

It is a super-2 number, since 2×1655743440431² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655743470431) 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, 827871720215 + 827871720216.

It is an arithmetic number, because the mean of its divisors is an integer number (827871720216).

Almost surely, 2^{1655743440431} is an apocalyptic number.

1655743440431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655743440431 is an equidigital number, since it uses as much as digits as its factorization.

1655743440431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 1655743440431 in words is "one trillion, six hundred fifty-five billion, seven hundred forty-three million, four hundred forty thousand, four hundred thirty-one".