11561010140 has 24 divisors (see below), whose sum is σ = 25706246832. Its totient is φ = 4352380160.

The previous prime is 11561010119. The next prime is 11561010169. The reversal of 11561010140 is 4101016511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17001146 + ... + 17001825.

It is an arithmetic number, because the mean of its divisors is an integer number (1071093618).

Almost surely, 2^11561010140 is an apocalyptic number.

11561010140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11561010140 is an abundant number, since it is smaller than the sum of its proper divisors (14145236692).

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

11561010140 is a wasteful number, since it uses less digits than its factorization.

11561010140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34002997 (or 34002995 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 11561010140 its reverse (4101016511), we get a palindrome (15662026651).

The spelling of 11561010140 in words is "eleven billion, five hundred sixty-one million, ten thousand, one hundred forty".