1655326054661 has 4 divisors (see below), whose sum is σ = 1657884519072. Its totient is φ = 1652767590252.

The previous prime is 1655326054633. The next prime is 1655326054687. The reversal of 1655326054661 is 1664506235561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1655326054661 - 2⁶ = 1655326054597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655326054691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279231235 + ... + 1279232528.

It is an arithmetic number, because the mean of its divisors is an integer number (414471129768).

Almost surely, 2^{1655326054661} is an apocalyptic number.

It is an amenable number.

1655326054661 is a deficient number, since it is larger than the sum of its proper divisors (2558464411).

1655326054661 is an equidigital number, since it uses as much as digits as its factorization.

1655326054661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558464410.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 1655326054661 in words is "one trillion, six hundred fifty-five billion, three hundred twenty-six million, fifty-four thousand, six hundred sixty-one".