1099623945840 has 640 divisors, whose sum is σ = 4242508462080. Its totient is φ = 229864243200.

The previous prime is 1099623945809. The next prime is 1099623945841. The reversal of 1099623945840 is 485493269901.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099623945841) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 314986495 + ... + 314989985.

It is an arithmetic number, because the mean of its divisors is an integer number (6628919472).

Almost surely, 2^{1099623945840} is an apocalyptic number.

1099623945840 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 1099623945840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2121254231040).

1099623945840 is an abundant number, since it is smaller than the sum of its proper divisors (3142884516240).

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

1099623945840 is a wasteful number, since it uses less digits than its factorization.

1099623945840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841 (or 3835 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 60.

The spelling of 1099623945840 in words is "one trillion, ninety-nine billion, six hundred twenty-three million, nine hundred forty-five thousand, eight hundred forty".