80505780053 has 4 divisors (see below), whose sum is σ = 81524840640. Its totient is φ = 79486719468.

The previous prime is 80505779983. The next prime is 80505780067. The reversal of 80505780053 is 35008750508.

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.

It is a cyclic number.

It is not a de Polignac number, because 80505780053 - 2²⁶ = 80438671189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80505780853) 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, 509530175 + ... + 509530332.

It is an arithmetic number, because the mean of its divisors is an integer number (20381210160).

Almost surely, 2^80505780053 is an apocalyptic number.

It is an amenable number.

80505780053 is a deficient number, since it is larger than the sum of its proper divisors (1019060587).

80505780053 is a wasteful number, since it uses less digits than its factorization.

80505780053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019060586.

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 80505780053 in words is "eighty billion, five hundred five million, seven hundred eighty thousand, fifty-three".