312780725812 has 6 divisors (see below), whose sum is σ = 547366270178. Its totient is φ = 156390362904.

The previous prime is 312780725729. The next prime is 312780725827. The reversal of 312780725812 is 218527087213.

It can be written as a sum of positive squares in only one way, i.e., 261656802576 + 51123923236 = 511524^2 + 226106^2 .

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 as a sum of consecutive naturals, namely, 39097590723 + ... + 39097590730.

Almost surely, 2^312780725812 is an apocalyptic number.

It is an amenable number.

312780725812 is a deficient number, since it is larger than the sum of its proper divisors (234585544366).

312780725812 is a wasteful number, since it uses less digits than its factorization.

312780725812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78195181457 (or 78195181455 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 312780725812 in words is "three hundred twelve billion, seven hundred eighty million, seven hundred twenty-five thousand, eight hundred twelve".