11597698080 has 144 divisors (see below), whose sum is σ = 39796697304. Its totient is φ = 3075563520.

The previous prime is 11597698069. The next prime is 11597698081. The reversal of 11597698080 is 8089679511.

It can be written as a sum of positive squares in 4 ways, for example, as 6562944144 + 5034753936 = 81012^2 + 70956^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (11597698081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238392 + ... + 282888.

Almost surely, 2^11597698080 is an apocalyptic number.

11597698080 is a gapful number since it is divisible by the number (10) 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 11597698080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19898348652).

11597698080 is an abundant number, since it is smaller than the sum of its proper divisors (28198999224).

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

11597698080 is a wasteful number, since it uses less digits than its factorization.

11597698080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44699 (or 44688 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The spelling of 11597698080 in words is "eleven billion, five hundred ninety-seven million, six hundred ninety-eight thousand, eighty".