505204542397 has 4 divisors (see below), whose sum is σ = 507125472480. Its totient is φ = 503283612316.

The previous prime is 505204542379. The next prime is 505204542407. The reversal of 505204542397 is 793245402505.

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 505204542397 - 2²⁷ = 505070324669 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 (505204542197) 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, 960464647 + ... + 960465172.

It is an arithmetic number, because the mean of its divisors is an integer number (126781368120).

Almost surely, 2^505204542397 is an apocalyptic number.

It is an amenable number.

505204542397 is a deficient number, since it is larger than the sum of its proper divisors (1920930083).

505204542397 is a wasteful number, since it uses less digits than its factorization.

505204542397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920930082.

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 505204542397 in words is "five hundred five billion, two hundred four million, five hundred forty-two thousand, three hundred ninety-seven".