10894949509 has 4 divisors (see below), whose sum is σ = 10898915500. Its totient is φ = 10890983520.

The previous prime is 10894949479. The next prime is 10894949519. The reversal of 10894949509 is 90594949801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90594949801 = 101 ⋅896979701.

It can be written as a sum of positive squares in 2 ways, for example, as 5829780609 + 5065168900 = 76353^2 + 71170^2 .

It is a cyclic number.

It is not a de Polignac number, because 10894949509 - 2¹¹ = 10894947461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10894949519) 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, 1978872 + ... + 1984369.

It is an arithmetic number, because the mean of its divisors is an integer number (2724728875).

Almost surely, 2^10894949509 is an apocalyptic number.

It is an amenable number.

10894949509 is a deficient number, since it is larger than the sum of its proper divisors (3965991).

10894949509 is an equidigital number, since it uses as much as digits as its factorization.

10894949509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965990.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The spelling of 10894949509 in words is "ten billion, eight hundred ninety-four million, nine hundred forty-nine thousand, five hundred nine".