1099528404991 has 8 divisors (see below), whose sum is σ = 1100018697264. Its totient is φ = 1099038198720.

The previous prime is 1099528404979. The next prime is 1099528405013. The reversal of 1099528404991 is 1994048259901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1099528404991 - 2²¹ = 1099526307839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099528404391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43257076 + ... + 43282486.

It is an arithmetic number, because the mean of its divisors is an integer number (137502337158).

Almost surely, 2^{1099528404991} is an apocalyptic number.

1099528404991 is a deficient number, since it is larger than the sum of its proper divisors (490292273).

1099528404991 is a wasteful number, since it uses less digits than its factorization.

1099528404991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43001.

The product of its (nonzero) digits is 8398080, while the sum is 61.

The spelling of 1099528404991 in words is "one trillion, ninety-nine billion, five hundred twenty-eight million, four hundred four thousand, nine hundred ninety-one".