11515479621426 has 64 divisors (see below), whose sum is σ = 27916972444800. Its totient is φ = 3489457003200.

The previous prime is 11515479621403. The next prime is 11515479621479. The reversal of 11515479621426 is 62412697451511.

11515479621426 is a `hidden beast` number, since 1 + 1 + 5 + 1 + 5 + 4 + 7 + 9 + 621 + 4 + 2 + 6 = 666.

It is a super-2 number, since 2×11515479621426² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27896656 + ... + 28306436.

It is an arithmetic number, because the mean of its divisors is an integer number (436202694450).

Almost surely, 2^{11515479621426} is an apocalyptic number.

11515479621426 is an abundant number, since it is smaller than the sum of its proper divisors (16401492823374).

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

11515479621426 is a wasteful number, since it uses less digits than its factorization.

11515479621426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457112 (or 457106 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 11515479621426 in words is "eleven trillion, five hundred fifteen billion, four hundred seventy-nine million, six hundred twenty-one thousand, four hundred twenty-six".