1099203538560 has 256 divisors, whose sum is σ = 3760639436160. Its totient is φ = 272098787328.

The previous prime is 1099203538547. The next prime is 1099203538567. The reversal of 1099203538560 is 658353029901.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1099203538567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2152059 + ... + 2613381.

Almost surely, 2^{1099203538560} is an apocalyptic number.

1099203538560 is a gapful number since it is divisible by the number (10) 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 1099203538560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1880319718080).

1099203538560 is an abundant number, since it is smaller than the sum of its proper divisors (2661435897600).

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

1099203538560 is a wasteful number, since it uses less digits than its factorization.

1099203538560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461435 (or 461423 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 51.

The spelling of 1099203538560 in words is "one trillion, ninety-nine billion, two hundred three million, five hundred thirty-eight thousand, five hundred sixty".