11561151040540 has 24 divisors (see below), whose sum is σ = 24279756117120. Its totient is φ = 4624205381568.

The previous prime is 11561151040531. The next prime is 11561151040583. The reversal of 11561151040540 is 4504015116511.

It is a junction number, because it is equal to n+sod(n) for n = 11561151040496 and 11561151040505.

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, 15567735 + ... + 16293454.

It is an arithmetic number, because the mean of its divisors is an integer number (1011656504880).

Almost surely, 2^{11561151040540} is an apocalyptic number.

11561151040540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11561151040540 is an abundant number, since it is smaller than the sum of its proper divisors (12718605076580).

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

11561151040540 is a wasteful number, since it uses less digits than its factorization.

11561151040540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31879341 (or 31879339 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 34.

The spelling of 11561151040540 in words is "eleven trillion, five hundred sixty-one billion, one hundred fifty-one million, forty thousand, five hundred forty".