11475555280 has 40 divisors (see below), whose sum is σ = 30492191232. Its totient is φ = 3934475904.

The previous prime is 11475555257. The next prime is 11475555307. The reversal of 11475555280 is 8255557411.

It is a tau number, because it is divible by the number of its divisors (40).

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, 10245472 + ... + 10246591.

Almost surely, 2^11475555280 is an apocalyptic number.

11475555280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11475555280 is an abundant number, since it is smaller than the sum of its proper divisors (19016635952).

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

11475555280 is a wasteful number, since it uses less digits than its factorization.

11475555280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20492083 (or 20492077 counting only the distinct ones).

The product of its (nonzero) digits is 280000, while the sum is 43.

The spelling of 11475555280 in words is "eleven billion, four hundred seventy-five million, five hundred fifty-five thousand, two hundred eighty".