1617406636641 has 4 divisors (see below), whose sum is σ = 2156542182192. Its totient is φ = 1078271091092.

The previous prime is 1617406636627. The next prime is 1617406636753. The reversal of 1617406636641 is 1466366047161.

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 1617406636641 - 2¹³ = 1617406628449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1617406616641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269567772771 + ... + 269567772776.

It is an arithmetic number, because the mean of its divisors is an integer number (539135545548).

Almost surely, 2^{1617406636641} is an apocalyptic number.

It is an amenable number.

1617406636641 is a deficient number, since it is larger than the sum of its proper divisors (539135545551).

1617406636641 is an equidigital number, since it uses as much as digits as its factorization.

1617406636641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539135545550.

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 1617406636641 in words is "one trillion, six hundred seventeen billion, four hundred six million, six hundred thirty-six thousand, six hundred forty-one".