11619173640 has 128 divisors (see below), whose sum is σ = 37034496000. Its totient is φ = 2910716928.

The previous prime is 11619173627. The next prime is 11619173647. The reversal of 11619173640 is 4637191611.

It is not an unprimeable number, because it can be changed into a prime (11619173647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83641 + ... + 173879.

It is an arithmetic number, because the mean of its divisors is an integer number (289332000).

Almost surely, 2^11619173640 is an apocalyptic number.

11619173640 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 11619173640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18517248000).

11619173640 is an abundant number, since it is smaller than the sum of its proper divisors (25415322360).

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

11619173640 is a wasteful number, since it uses less digits than its factorization.

11619173640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90319 (or 90315 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 11619173640 in words is "eleven billion, six hundred nineteen million, one hundred seventy-three thousand, six hundred forty".