1009009999955 has 16 divisors (see below), whose sum is σ = 1221585460704. Its totient is φ = 800026375680.

The previous prime is 1009009999951. The next prime is 1009009999967. The reversal of 1009009999955 is 5599999009001.

It is not a de Polignac number, because 1009009999955 - 2² = 1009009999951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1009009999891 and 1009009999900.

It is not an unprimeable number, because it can be changed into a prime (1009009999951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20915372 + ... + 20963558.

It is an arithmetic number, because the mean of its divisors is an integer number (76349091294).

Almost surely, 2^{1009009999955} is an apocalyptic number.

1009009999955 is a deficient number, since it is larger than the sum of its proper divisors (212575460749).

1009009999955 is a wasteful number, since it uses less digits than its factorization.

1009009999955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85366.

The product of its (nonzero) digits is 13286025, while the sum is 65.

The spelling of 1009009999955 in words is "one trillion, nine billion, nine million, nine hundred ninety-nine thousand, nine hundred fifty-five".