11531562606 has 12 divisors (see below), whose sum is σ = 24985052352. Its totient is φ = 3843854196.

The previous prime is 11531562571. The next prime is 11531562611. The reversal of 11531562606 is 60626513511.

11531562606 is a `hidden beast` number, since 1 + 1 + 5 + 31 + 562 + 60 + 6 = 666.

It is a super-2 number, since 2×11531562606² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 320321166 + ... + 320321201.

It is an arithmetic number, because the mean of its divisors is an integer number (2082087696).

Almost surely, 2^11531562606 is an apocalyptic number.

11531562606 is an abundant number, since it is smaller than the sum of its proper divisors (13453489746).

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

11531562606 is a wasteful number, since it uses less digits than its factorization.

11531562606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640642375 (or 640642372 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 11531562606 in words is "eleven billion, five hundred thirty-one million, five hundred sixty-two thousand, six hundred six".