319440628477 has 2 divisors, whose sum is σ = 319440628478. Its totient is φ = 319440628476.

The previous prime is 319440628469. The next prime is 319440628487. The reversal of 319440628477 is 774826044913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173683896516 + 145756731961 = 416754^2 + 381781^2 .

It is a cyclic number.

It is not a de Polignac number, because 319440628477 - 2³ = 319440628469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319440628487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159720314238 + 159720314239.

It is an arithmetic number, because the mean of its divisors is an integer number (159720314239).

Almost surely, 2^319440628477 is an apocalyptic number.

It is an amenable number.

319440628477 is a deficient number, since it is larger than the sum of its proper divisors (1).

319440628477 is an equidigital number, since it uses as much as digits as its factorization.

319440628477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 319440628477 in words is "three hundred nineteen billion, four hundred forty million, six hundred twenty-eight thousand, four hundred seventy-seven".