10999473408 has 540 divisors, whose sum is σ = 41390166048. Its totient is φ = 2822584320.

The previous prime is 10999473389. The next prime is 10999473437. The reversal of 10999473408 is 80437499901.

10999473408 is a `hidden beast` number, since 109 + 99 + 47 + 3 + 408 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 132523735 + ... + 132523817.

Almost surely, 2^10999473408 is an apocalyptic number.

10999473408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10999473408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20695083024).

10999473408 is an abundant number, since it is smaller than the sum of its proper divisors (30390692640).

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

10999473408 is an frugal number, since it uses more digits than its factorization.

10999473408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

It can be divided in two parts, 1099947 and 3408, that added together give a triangular number (1103355 = T₁₄₈₅).

The spelling of 10999473408 in words is "ten billion, nine hundred ninety-nine million, four hundred seventy-three thousand, four hundred eight".