1009645509099 has 32 divisors (see below), whose sum is σ = 1420805836800. Its totient is φ = 635980788000.

The previous prime is 1009645509091. The next prime is 1009645509181. The reversal of 1009645509099 is 9909055469001.

It is not a de Polignac number, because 1009645509099 - 2³ = 1009645509091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (1009645509091) 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, 46407474 + ... + 46429224.

It is an arithmetic number, because the mean of its divisors is an integer number (44400182400).

Almost surely, 2^{1009645509099} is an apocalyptic number.

1009645509099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1009645509099 is a deficient number, since it is larger than the sum of its proper divisors (411160327701).

1009645509099 is a wasteful number, since it uses less digits than its factorization.

1009645509099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23895.

The product of its (nonzero) digits is 3936600, while the sum is 57.

The spelling of 1009645509099 in words is "one trillion, nine billion, six hundred forty-five million, five hundred nine thousand, ninety-nine".