52780919693 has 4 divisors (see below), whose sum is σ = 52785259260. Its totient is φ = 52776580128.

The previous prime is 52780919669. The next prime is 52780919699. The reversal of 52780919693 is 39691908725.

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 25778871364 + 27002048329 = 160558^2 + 164323^2 .

It is a cyclic number.

It is not a de Polignac number, because 52780919693 - 2⁶ = 52780919629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52780919699) 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, 2151488 + ... + 2175881.

It is an arithmetic number, because the mean of its divisors is an integer number (13196314815).

Almost surely, 2^52780919693 is an apocalyptic number.

It is an amenable number.

52780919693 is a deficient number, since it is larger than the sum of its proper divisors (4339567).

52780919693 is a wasteful number, since it uses less digits than its factorization.

52780919693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4339566.

The product of its (nonzero) digits is 7348320, while the sum is 59.

The spelling of 52780919693 in words is "fifty-two billion, seven hundred eighty million, nine hundred nineteen thousand, six hundred ninety-three".