11278805454 has 96 divisors (see below), whose sum is σ = 29823805440. Its totient is φ = 3010996800.

The previous prime is 11278805453. The next prime is 11278805467. The reversal of 11278805454 is 45450887211.

11278805454 is a `hidden beast` number, since 1 + 1 + 27 + 8 + 80 + 545 + 4 = 666.

It is a super-2 number, since 2×11278805454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11278805453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63489 + ... + 163059.

It is an arithmetic number, because the mean of its divisors is an integer number (310664640).

Almost surely, 2^11278805454 is an apocalyptic number.

11278805454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11278805454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14911902720).

11278805454 is an abundant number, since it is smaller than the sum of its proper divisors (18544999986).

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

11278805454 is a wasteful number, since it uses less digits than its factorization.

11278805454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99646 (or 99643 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The spelling of 11278805454 in words is "eleven billion, two hundred seventy-eight million, eight hundred five thousand, four hundred fifty-four".