11971630140 has 48 divisors (see below), whose sum is σ = 33639059328. Its totient is φ = 3181149504.

The previous prime is 11971630133. The next prime is 11971630141. The reversal of 11971630140 is 4103617911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971630141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335542 + ... + 369501.

It is an arithmetic number, because the mean of its divisors is an integer number (700813736).

Almost surely, 2^11971630140 is an apocalyptic number.

11971630140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11971630140 is an abundant number, since it is smaller than the sum of its proper divisors (21667429188).

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

11971630140 is a wasteful number, since it uses less digits than its factorization.

11971630140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705338 (or 705336 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The spelling of 11971630140 in words is "eleven billion, nine hundred seventy-one million, six hundred thirty thousand, one hundred forty".