255345431512445 has 4 divisors (see below), whose sum is σ = 306414517814940. Its totient is φ = 204276345209952.

The previous prime is 255345431512441. The next prime is 255345431512469. The reversal of 255345431512445 is 544215134543552.

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 105902972700889 + 149442458811556 = 10290917^2 + 12224666^2 .

It is a cyclic number.

It is not a de Polignac number, because 255345431512445 - 2² = 255345431512441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255345431512441) 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, 25534543151240 + ... + 25534543151249.

It is an arithmetic number, because the mean of its divisors is an integer number (76603629453735).

Almost surely, 2^{255345431512445} is an apocalyptic number.

It is an amenable number.

255345431512445 is a deficient number, since it is larger than the sum of its proper divisors (51069086302495).

255345431512445 is an equidigital number, since it uses as much as digits as its factorization.

255345431512445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51069086302494.

The product of its digits is 28800000, while the sum is 53.

The spelling of 255345431512445 in words is "two hundred fifty-five trillion, three hundred forty-five billion, four hundred thirty-one million, five hundred twelve thousand, four hundred forty-five".