11539271240 has 128 divisors (see below), whose sum is σ = 30632152320. Its totient is φ = 3829862400.

The previous prime is 11539271231. The next prime is 11539271269. The reversal of 11539271240 is 4217293511.

It is a Cunningham number, because it is equal to 107421²-1.

It is a super-2 number, since 2×11539271240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 11539271240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1500044 + ... + 1507716.

It is an arithmetic number, because the mean of its divisors is an integer number (239313690).

Almost surely, 2^11539271240 is an apocalyptic number.

11539271240 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 11539271240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15316076160).

11539271240 is an abundant number, since it is smaller than the sum of its proper divisors (19092881080).

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

11539271240 is a wasteful number, since it uses less digits than its factorization.

11539271240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863 (or 7859 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 11539271240 in words is "eleven billion, five hundred thirty-nine million, two hundred seventy-one thousand, two hundred forty".