11551481982 has 32 divisors (see below), whose sum is σ = 25685932800. Its totient is φ = 3848098104.

The previous prime is 11551481951. The next prime is 11551482013. The reversal of 11551481982 is 28918415511.

11551481982 is a `hidden beast` number, since 1 + 1 + 551 + 4 + 8 + 1 + 98 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (11551481951) and next prime (11551482013).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22119 + ... + 153597.

It is an arithmetic number, because the mean of its divisors is an integer number (802685400).

Almost surely, 2^11551481982 is an apocalyptic number.

11551481982 is an abundant number, since it is smaller than the sum of its proper divisors (14134450818).

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

11551481982 is a wasteful number, since it uses less digits than its factorization.

11551481982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133117 (or 133111 counting only the distinct ones).

The product of its digits is 115200, while the sum is 45.

The spelling of 11551481982 in words is "eleven billion, five hundred fifty-one million, four hundred eighty-one thousand, nine hundred eighty-two".