11274430640 has 40 divisors (see below), whose sum is σ = 28596058128. Its totient is φ = 4099792640.

The previous prime is 11274430639. The next prime is 11274430663. The reversal of 11274430640 is 4603447211.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×11274430640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11274430597 and 11274430606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6405047 + ... + 6406806.

Almost surely, 2^11274430640 is an apocalyptic number.

11274430640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11274430640 is an abundant number, since it is smaller than the sum of its proper divisors (17321627488).

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

11274430640 is a wasteful number, since it uses less digits than its factorization.

11274430640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12811877 (or 12811871 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 11274430640 its reverse (4603447211), we get a palindrome (15877877851).

The spelling of 11274430640 in words is "eleven billion, two hundred seventy-four million, four hundred thirty thousand, six hundred forty".