653243231257 has 4 divisors (see below), whose sum is σ = 653354314036. Its totient is φ = 653132148480.

The previous prime is 653243231213. The next prime is 653243231273. The reversal of 653243231257 is 752132342356.

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 306676718656 + 346566512601 = 553784^2 + 588699^2 .

It is a cyclic number.

It is not a de Polignac number, because 653243231257 - 2²³ = 653234842649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653243234257) 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, 55532568 + ... + 55544329.

It is an arithmetic number, because the mean of its divisors is an integer number (163338578509).

Almost surely, 2^653243231257 is an apocalyptic number.

It is an amenable number.

653243231257 is a deficient number, since it is larger than the sum of its proper divisors (111082779).

653243231257 is a wasteful number, since it uses less digits than its factorization.

653243231257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111082778.

The product of its digits is 907200, while the sum is 43.

The spelling of 653243231257 in words is "six hundred fifty-three billion, two hundred forty-three million, two hundred thirty-one thousand, two hundred fifty-seven".