11899597578 has 128 divisors (see below), whose sum is σ = 26990198784. Its totient is φ = 3467059200.

The previous prime is 11899597547. The next prime is 11899597583. The reversal of 11899597578 is 87579599811.

Its product of digits (57153600) is a multiple of the sum of its prime divisors (540).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61655850 + ... + 61656042.

It is an arithmetic number, because the mean of its divisors is an integer number (210860928).

Almost surely, 2^11899597578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11899597578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13495099392).

11899597578 is an abundant number, since it is smaller than the sum of its proper divisors (15090601206).

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

11899597578 is a wasteful number, since it uses less digits than its factorization.

11899597578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its digits is 57153600, while the sum is 69.

The spelling of 11899597578 in words is "eleven billion, eight hundred ninety-nine million, five hundred ninety-seven thousand, five hundred seventy-eight".