11971797210 has 48 divisors (see below), whose sum is σ = 32764923360. Its totient is φ = 3024453600.

The previous prime is 11971797193. The next prime is 11971797221. The reversal of 11971797210 is 1279717911.

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

It is a Curzon 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, 3498816 + ... + 3502235.

It is an arithmetic number, because the mean of its divisors is an integer number (682602570).

Almost surely, 2^11971797210 is an apocalyptic number.

11971797210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11971797210 is an abundant number, since it is smaller than the sum of its proper divisors (20793126150).

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

11971797210 is a wasteful number, since it uses less digits than its factorization.

11971797210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001083 (or 7001080 counting only the distinct ones).

The product of its (nonzero) digits is 55566, while the sum is 45.

The spelling of 11971797210 in words is "eleven billion, nine hundred seventy-one million, seven hundred ninety-seven thousand, two hundred ten".