11279721607 has 16 divisors (see below), whose sum is σ = 14083990272. Its totient is φ = 8776293120.

The previous prime is 11279721589. The next prime is 11279721653. The reversal of 11279721607 is 70612797211.

It is a de Polignac number, because none of the positive numbers 2^k-11279721607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11279721667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57013 + ... + 160654.

It is an arithmetic number, because the mean of its divisors is an integer number (880249392).

Almost surely, 2^11279721607 is an apocalyptic number.

11279721607 is a deficient number, since it is larger than the sum of its proper divisors (2804268665).

11279721607 is a wasteful number, since it uses less digits than its factorization.

11279721607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218358.

The product of its (nonzero) digits is 74088, while the sum is 43.

The spelling of 11279721607 in words is "eleven billion, two hundred seventy-nine million, seven hundred twenty-one thousand, six hundred seven".