1641866679432 has 128 divisors (see below), whose sum is σ = 5380413235200. Its totient is φ = 453972340800.

The previous prime is 1641866679413. The next prime is 1641866679433. The reversal of 1641866679432 is 2349766681461.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1641866679432.

It is not an unprimeable number, because it can be changed into a prime (1641866679433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17467494 + ... + 17561237.

It is an arithmetic number, because the mean of its divisors is an integer number (42034478400).

Almost surely, 2^{1641866679432} is an apocalyptic number.

1641866679432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1641866679432 is an abundant number, since it is smaller than the sum of its proper divisors (3738546555768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641866679432 is a wasteful number, since it uses less digits than its factorization.

1641866679432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35028784 (or 35028774 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 1641866679432 in words is "one trillion, six hundred forty-one billion, eight hundred sixty-six million, six hundred seventy-nine thousand, four hundred thirty-two".