1655807853493 has 2 divisors, whose sum is σ = 1655807853494. Its totient is φ = 1655807853492.

The previous prime is 1655807853467. The next prime is 1655807853547. The reversal of 1655807853493 is 3943587085561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1468888248529 + 186919604964 = 1211977^2 + 432342^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655807853493 - 2²⁵ = 1655774299061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655807853433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827903926746 + 827903926747.

It is an arithmetic number, because the mean of its divisors is an integer number (827903926747).

Almost surely, 2^{1655807853493} is an apocalyptic number.

It is an amenable number.

1655807853493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655807853493 is an equidigital number, since it uses as much as digits as its factorization.

1655807853493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864000, while the sum is 64.

The spelling of 1655807853493 in words is "one trillion, six hundred fifty-five billion, eight hundred seven million, eight hundred fifty-three thousand, four hundred ninety-three".