109645744321 has 4 divisors (see below), whose sum is σ = 109646914644. Its totient is φ = 109644574000.

The previous prime is 109645744303. The next prime is 109645744361. The reversal of 109645744321 is 123447546901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24329760400 + 85315983921 = 155980^2 + 292089^2 .

It is a cyclic number.

It is not a de Polignac number, because 109645744321 - 2¹⁹ = 109645220033 is a prime.

It is a super-2 number, since 2×109645744321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109645744361) 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, 431110 + ... + 636511.

It is an arithmetic number, because the mean of its divisors is an integer number (27411728661).

Almost surely, 2^109645744321 is an apocalyptic number.

It is an amenable number.

109645744321 is a deficient number, since it is larger than the sum of its proper divisors (1170323).

109645744321 is a wasteful number, since it uses less digits than its factorization.

109645744321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170322.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 109645744321 in words is "one hundred nine billion, six hundred forty-five million, seven hundred forty-four thousand, three hundred twenty-one".