11662009497 has 6 divisors (see below), whose sum is σ = 16845124842. Its totient is φ = 7774672992.

The previous prime is 11662009483. The next prime is 11662009507. The reversal of 11662009497 is 79490026611.

11662009497 is a `hidden beast` number, since 1 + 16 + 620 + 0 + 9 + 4 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6087744576 + 5574264921 = 78024^2 + 74661^2 .

It is not a de Polignac number, because 11662009497 - 2²⁶ = 11594900633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11662009427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 647889408 + ... + 647889425.

It is an arithmetic number, because the mean of its divisors is an integer number (2807520807).

Almost surely, 2^11662009497 is an apocalyptic number.

It is an amenable number.

11662009497 is a deficient number, since it is larger than the sum of its proper divisors (5183115345).

11662009497 is a wasteful number, since it uses less digits than its factorization.

11662009497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295778839 (or 1295778836 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 11662009497 in words is "eleven billion, six hundred sixty-two million, nine thousand, four hundred ninety-seven".