17780505053 has 4 divisors (see below), whose sum is σ = 17783116320. Its totient is φ = 17777893788.

The previous prime is 17780505023. The next prime is 17780505103. The reversal of 17780505053 is 35050508771.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35050508771 = 647 ⋅54173893.

It is a cyclic number.

It is not a de Polignac number, because 17780505053 - 2²⁶ = 17713396189 is a prime.

It is a super-2 number, since 2×17780505053² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17780505053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17780505013) 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, 1295393 + ... + 1309046.

It is an arithmetic number, because the mean of its divisors is an integer number (4445779080).

Almost surely, 2^17780505053 is an apocalyptic number.

It is an amenable number.

17780505053 is a deficient number, since it is larger than the sum of its proper divisors (2611267).

17780505053 is an equidigital number, since it uses as much as digits as its factorization.

17780505053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611266.

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 17780505053 in words is "seventeen billion, seven hundred eighty million, five hundred five thousand, fifty-three".