1099954512 has 80 divisors (see below), whose sum is σ = 3195420480. Its totient is φ = 362222208.

The previous prime is 1099954487. The next prime is 1099954547. The reversal of 1099954512 is 2154599901.

1099954512 is a `hidden beast` number, since 1 + 0 + 9 + 99 + 545 + 12 = 666.

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, 20518 + ... + 51194.

It is an arithmetic number, because the mean of its divisors is an integer number (39942756).

Almost surely, 2^1099954512 is an apocalyptic number.

1099954512 is a gapful number since it is divisible by the number (12) 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 1099954512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1597710240).

1099954512 is an abundant number, since it is smaller than the sum of its proper divisors (2095465968).

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

1099954512 is a wasteful number, since it uses less digits than its factorization.

1099954512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30777 (or 30765 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 1099954512 is about 33165.5621390623. The cubic root of 1099954512 is about 1032.2658860609.

The spelling of 1099954512 in words is "one billion, ninety-nine million, nine hundred fifty-four thousand, five hundred twelve".