1641322661244 has 24 divisors (see below), whose sum is σ = 4376860430208. Its totient is φ = 468949331760.

The previous prime is 1641322661233. The next prime is 1641322661267. The reversal of 1641322661244 is 4421662231461.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

It is a junction number, because it is equal to n+sod(n) for n = 1641322661196 and 1641322661205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9769777662 + ... + 9769777829.

It is an arithmetic number, because the mean of its divisors is an integer number (182369184592).

Almost surely, 2^{1641322661244} is an apocalyptic number.

1641322661244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1641322661244 is an abundant number, since it is smaller than the sum of its proper divisors (2735537768964).

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

1641322661244 is a wasteful number, since it uses less digits than its factorization.

1641322661244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19539555505 (or 19539555503 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The spelling of 1641322661244 in words is "one trillion, six hundred forty-one billion, three hundred twenty-two million, six hundred sixty-one thousand, two hundred forty-four".