11897097912 has 640 divisors, whose sum is σ = 42635366400. Its totient is φ = 3023308800.

The previous prime is 11897097911. The next prime is 11897097923. The reversal of 11897097912 is 21979079811.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11897097911) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 162973908 + ... + 162973980.

It is an arithmetic number, because the mean of its divisors is an integer number (66617760).

Almost surely, 2^11897097912 is an apocalyptic number.

11897097912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11897097912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21317683200).

11897097912 is an abundant number, since it is smaller than the sum of its proper divisors (30738268488).

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

11897097912 is a wasteful number, since it uses less digits than its factorization.

11897097912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 54.

The spelling of 11897097912 in words is "eleven billion, eight hundred ninety-seven million, ninety-seven thousand, nine hundred twelve".