11555116890 has 32 divisors (see below), whose sum is σ = 27766618560. Its totient is φ = 3077549184.

The previous prime is 11555116889. The next prime is 11555116891. The reversal of 11555116890 is 9861155511.

It is an interprime number because it is at equal distance from previous prime (11555116889) and next prime (11555116891).

It is a super-3 number, since 3×11555116890³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11555116891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213784 + ... + 262323.

It is an arithmetic number, because the mean of its divisors is an integer number (867706830).

Almost surely, 2^11555116890 is an apocalyptic number.

11555116890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11555116890 is an abundant number, since it is smaller than the sum of its proper divisors (16211501670).

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

11555116890 is a wasteful number, since it uses less digits than its factorization.

11555116890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476926.

The product of its (nonzero) digits is 54000, while the sum is 42.

The spelling of 11555116890 in words is "eleven billion, five hundred fifty-five million, one hundred sixteen thousand, eight hundred ninety".