391628066075 has 12 divisors (see below), whose sum is σ = 485627016840. Its totient is φ = 313297152960.

The previous prime is 391628066057. The next prime is 391628066111. The reversal of 391628066075 is 570660826193.

It is not a de Polignac number, because 391628066075 - 2²⁰ = 391627017499 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2137436 + ... + 2313414.

It is an arithmetic number, because the mean of its divisors is an integer number (40468918070).

Almost surely, 2^391628066075 is an apocalyptic number.

391628066075 is a deficient number, since it is larger than the sum of its proper divisors (93998950765).

391628066075 is a wasteful number, since it uses less digits than its factorization.

391628066075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265006 (or 265001 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 391628066075 in words is "three hundred ninety-one billion, six hundred twenty-eight million, sixty-six thousand, seventy-five".