11451863898 has 24 divisors (see below), whose sum is σ = 25891171488. Its totient is φ = 3651318792.

The previous prime is 11451863897. The next prime is 11451863909. The reversal of 11451863898 is 89836815411.

It is a happy number.

11451863898 is a `hidden beast` number, since 1 + 1 + 4 + 518 + 6 + 38 + 98 = 666.

11451863898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11451863898² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11451863897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13830340 + ... + 13831167.

It is an arithmetic number, because the mean of its divisors is an integer number (1078798812).

Almost surely, 2^11451863898 is an apocalyptic number.

11451863898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11451863898 is an abundant number, since it is smaller than the sum of its proper divisors (14439307590).

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

11451863898 is a wasteful number, since it uses less digits than its factorization.

11451863898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27661538 (or 27661535 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The spelling of 11451863898 in words is "eleven billion, four hundred fifty-one million, eight hundred sixty-three thousand, eight hundred ninety-eight".