10555551110509 has 4 divisors (see below), whose sum is σ = 10556709924220. Its totient is φ = 10554392296800.

The previous prime is 10555551110483. The next prime is 10555551110549. The reversal of 10555551110509 is 90501115555501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4820110475625 + 5735440634884 = 2195475^2 + 2394878^2 .

It is a cyclic number.

It is not a de Polignac number, because 10555551110509 - 2¹⁹ = 10555550586221 is a prime.

It is a super-2 number, since 2×10555551110509² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10555551110549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579393192 + ... + 579411409.

It is an arithmetic number, because the mean of its divisors is an integer number (2639177481055).

Almost surely, 2^{10555551110509} is an apocalyptic number.

It is an amenable number.

10555551110509 is a deficient number, since it is larger than the sum of its proper divisors (1158813711).

10555551110509 is an equidigital number, since it uses as much as digits as its factorization.

10555551110509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158813710.

The product of its (nonzero) digits is 140625, while the sum is 43.

The spelling of 10555551110509 in words is "ten trillion, five hundred fifty-five billion, five hundred fifty-one million, one hundred ten thousand, five hundred nine".