11906536649 has 16 divisors (see below), whose sum is σ = 13942376448. Its totient is φ = 9955842192.

The previous prime is 11906536633. The next prime is 11906536673. The reversal of 11906536649 is 94663560911.

It is a cyclic number.

It is not a de Polignac number, because 11906536649 - 2⁴ = 11906536633 is a prime.

It is a super-2 number, since 2×11906536649² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11906536597 and 11906536606.

It is not an unprimeable number, because it can be changed into a prime (11906536849) 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, 42062 + ... + 159944.

It is an arithmetic number, because the mean of its divisors is an integer number (871398528).

Almost surely, 2^11906536649 is an apocalyptic number.

It is an amenable number.

11906536649 is a deficient number, since it is larger than the sum of its proper divisors (2035839799).

11906536649 is a wasteful number, since it uses less digits than its factorization.

11906536649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118244.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The spelling of 11906536649 in words is "eleven billion, nine hundred six million, five hundred thirty-six thousand, six hundred forty-nine".