109800573781 has 4 divisors (see below), whose sum is σ = 109808568972. Its totient is φ = 109792578592.

The previous prime is 109800573739. The next prime is 109800573791. The reversal of 109800573781 is 187375008901.

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 23002575556 + 86797998225 = 151666^2 + 294615^2 .

It is a cyclic number.

It is not a de Polignac number, because 109800573781 - 2⁹ = 109800573269 is a prime.

It is a super-2 number, since 2×109800573781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109800573731) 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, 3976960 + ... + 4004473.

It is an arithmetic number, because the mean of its divisors is an integer number (27452142243).

Almost surely, 2^109800573781 is an apocalyptic number.

It is an amenable number.

109800573781 is a deficient number, since it is larger than the sum of its proper divisors (7995191).

109800573781 is an equidigital number, since it uses as much as digits as its factorization.

109800573781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7995190.

The product of its (nonzero) digits is 423360, while the sum is 49.

The spelling of 109800573781 in words is "one hundred nine billion, eight hundred million, five hundred seventy-three thousand, seven hundred eighty-one".