11617165720 has 16 divisors (see below), whose sum is σ = 26138622960. Its totient is φ = 4646866272.

The previous prime is 11617165699. The next prime is 11617165741. The reversal of 11617165720 is 2756171611.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11617165699) and next prime (11617165741).

It is a self number, because there is not a number n which added to its sum of digits gives 11617165720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145214532 + ... + 145214611.

It is an arithmetic number, because the mean of its divisors is an integer number (1633663935).

Almost surely, 2^11617165720 is an apocalyptic number.

11617165720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11617165720 is an abundant number, since it is smaller than the sum of its proper divisors (14521457240).

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

11617165720 is a wasteful number, since it uses less digits than its factorization.

11617165720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290429154 (or 290429150 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 11617165720 in words is "eleven billion, six hundred seventeen million, one hundred sixty-five thousand, seven hundred twenty".