11700597780 has 72 divisors (see below), whose sum is σ = 35505943200. Its totient is φ = 3118917312.

The previous prime is 11700597763. The next prime is 11700597817. The reversal of 11700597780 is 8779500711.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 495891 + ... + 518949.

It is an arithmetic number, because the mean of its divisors is an integer number (493138100).

Almost surely, 2^11700597780 is an apocalyptic number.

11700597780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11700597780 is an abundant number, since it is smaller than the sum of its proper divisors (23805345420).

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

11700597780 is a wasteful number, since it uses less digits than its factorization.

11700597780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25893 (or 25888 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 45.

The spelling of 11700597780 in words is "eleven billion, seven hundred million, five hundred ninety-seven thousand, seven hundred eighty".