11505510140 has 24 divisors (see below), whose sum is σ = 24169948992. Its totient is φ = 4600608320.

The previous prime is 11505510131. The next prime is 11505510167. The reversal of 11505510140 is 4101550511.

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, 39731 + ... + 156810.

It is an arithmetic number, because the mean of its divisors is an integer number (1007081208).

Almost surely, 2^11505510140 is an apocalyptic number.

11505510140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11505510140 is an abundant number, since it is smaller than the sum of its proper divisors (12664438852).

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

11505510140 is a wasteful number, since it uses less digits than its factorization.

11505510140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199477 (or 199475 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 23.

The spelling of 11505510140 in words is "eleven billion, five hundred five million, five hundred ten thousand, one hundred forty".