11555542634 has 16 divisors (see below), whose sum is σ = 18356907528. Its totient is φ = 5436721152.

The previous prime is 11555542627. The next prime is 11555542643. The reversal of 11555542634 is 43624555511.

It can be written as a sum of positive squares in 4 ways, for example, as 10151167009 + 1404375625 = 100753^2 + 37475^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11555542591 and 11555542600.

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, 133274 + ... + 202170.

Almost surely, 2^11555542634 is an apocalyptic number.

11555542634 is a deficient number, since it is larger than the sum of its proper divisors (6801364894).

11555542634 is a wasteful number, since it uses less digits than its factorization.

11555542634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73849.

The product of its digits is 360000, while the sum is 41.

The spelling of 11555542634 in words is "eleven billion, five hundred fifty-five million, five hundred forty-two thousand, six hundred thirty-four".