1636434141661 has 16 divisors (see below), whose sum is σ = 1960861386240. Its totient is φ = 1348092195120.

The previous prime is 1636434141659. The next prime is 1636434141763. The reversal of 1636434141661 is 1661414346361.

It is not a de Polignac number, because 1636434141661 - 2¹ = 1636434141659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636434141611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170208855 + ... + 170218468.

It is an arithmetic number, because the mean of its divisors is an integer number (122553836640).

Almost surely, 2^{1636434141661} is an apocalyptic number.

1636434141661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1636434141661 is a deficient number, since it is larger than the sum of its proper divisors (324427244579).

1636434141661 is a wasteful number, since it uses less digits than its factorization.

1636434141661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340427376.

The product of its digits is 746496, while the sum is 46.

The spelling of 1636434141661 in words is "one trillion, six hundred thirty-six billion, four hundred thirty-four million, one hundred forty-one thousand, six hundred sixty-one".