11415426649 has 15 divisors (see below), whose sum is σ = 12571128165. Its totient is φ = 10365907860.

The previous prime is 11415426643. The next prime is 11415426703. The reversal of 11415426649 is 94662451411.

The square root of 11415426649 is 106843.

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

It is not a de Polignac number, because 11415426649 - 2³ = 11415426641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11415426641) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 12927562 + ... + 12928444.

It is an arithmetic number, because the mean of its divisors is an integer number (838075211).

Almost surely, 2^11415426649 is an apocalyptic number.

11415426649 is the 106843-rd square number.

11415426649 is the 53422-nd centered octagonal number.

It is an amenable number.

11415426649 is a deficient number, since it is larger than the sum of its proper divisors (1155701516).

11415426649 is an frugal number, since it uses more digits than its factorization.

11415426649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810 (or 894 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The spelling of 11415426649 in words is "eleven billion, four hundred fifteen million, four hundred twenty-six thousand, six hundred forty-nine".