11523209907 has 16 divisors (see below), whose sum is σ = 16770274560. Its totient is φ = 6979912800.

The previous prime is 11523209899. The next prime is 11523209911. The reversal of 11523209907 is 70990232511.

It is not a de Polignac number, because 11523209907 - 2³ = 11523209899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11523209207) 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, 34932 + ... + 155777.

It is an arithmetic number, because the mean of its divisors is an integer number (1048142160).

Almost surely, 2^11523209907 is an apocalyptic number.

11523209907 is a deficient number, since it is larger than the sum of its proper divisors (5247064653).

11523209907 is a wasteful number, since it uses less digits than its factorization.

11523209907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192554.

The product of its (nonzero) digits is 34020, while the sum is 39.

The spelling of 11523209907 in words is "eleven billion, five hundred twenty-three million, two hundred nine thousand, nine hundred seven".