312355720645 has 8 divisors (see below), whose sum is σ = 375028287480. Its totient is φ = 249750294720.

The previous prime is 312355720619. The next prime is 312355720669. The reversal of 312355720645 is 546027553213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4102018209 + 308253702436 = 64047^2 + 555206^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312355720645 - 2⁷ = 312355720517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16774990 + ... + 16793599.

It is an arithmetic number, because the mean of its divisors is an integer number (46878535935).

Almost surely, 2^312355720645 is an apocalyptic number.

It is an amenable number.

312355720645 is a deficient number, since it is larger than the sum of its proper divisors (62672566835).

312355720645 is a wasteful number, since it uses less digits than its factorization.

312355720645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33570455.

The product of its (nonzero) digits is 756000, while the sum is 43.

The spelling of 312355720645 in words is "three hundred twelve billion, three hundred fifty-five million, seven hundred twenty thousand, six hundred forty-five".