11700505215 has 32 divisors (see below), whose sum is σ = 23772456960. Its totient is φ = 5348801952.

The previous prime is 11700505177. The next prime is 11700505217. The reversal of 11700505215 is 51250500711.

It is not a de Polignac number, because 11700505215 - 2⁶ = 11700505151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11700505217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6189799 + ... + 6191688.

It is an arithmetic number, because the mean of its divisors is an integer number (742889280).

Almost surely, 2^11700505215 is an apocalyptic number.

11700505215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11700505215 is an abundant number, since it is smaller than the sum of its proper divisors (12071951745).

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

11700505215 is a wasteful number, since it uses less digits than its factorization.

11700505215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12381508 (or 12381502 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The spelling of 11700505215 in words is "eleven billion, seven hundred million, five hundred five thousand, two hundred fifteen".