1099901732644 has 243 divisors, whose sum is σ = 2430504247059. Its totient is φ = 434942576640.

The previous prime is 1099901732641. The next prime is 1099901732681. The reversal of 1099901732644 is 4462371099901.

The square root of 1099901732644 is 1048762.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 414913763044 + 684987969600 = 644138^2 + 827640^2 .

It is not an unprimeable number, because it can be changed into a prime (1099901732641) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 5698972612 + ... + 5698972804.

Almost surely, 2^{1099901732644} is an apocalyptic number.

1099901732644 is the 1048762-nd square number.

It is an amenable number.

1099901732644 is an abundant number, since it is smaller than the sum of its proper divisors (1330602514415).

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

1099901732644 is a wasteful number, since it uses less digits than its factorization.

1099901732644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 1099901732644 in words is "one trillion, ninety-nine billion, nine hundred one million, seven hundred thirty-two thousand, six hundred forty-four".