1655755901641 has 4 divisors (see below), whose sum is σ = 1664903724484. Its totient is φ = 1646608078800.

The previous prime is 1655755901627. The next prime is 1655755901651. The reversal of 1655755901641 is 1461095575561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21666662416 + 1634089239225 = 147196^2 + 1278315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655755901641 - 2²⁷ = 1655621683913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655755901651) 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, 4573911150 + ... + 4573911511.

It is an arithmetic number, because the mean of its divisors is an integer number (416225931121).

Almost surely, 2^{1655755901641} is an apocalyptic number.

It is an amenable number.

1655755901641 is a deficient number, since it is larger than the sum of its proper divisors (9147822843).

1655755901641 is an equidigital number, since it uses as much as digits as its factorization.

1655755901641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9147822842.

The product of its (nonzero) digits is 5670000, while the sum is 55.

The spelling of 1655755901641 in words is "one trillion, six hundred fifty-five billion, seven hundred fifty-five million, nine hundred one thousand, six hundred forty-one".