391274682490 has 16 divisors (see below), whose sum is σ = 704406886920. Its totient is φ = 156484882240.

The previous prime is 391274682443. The next prime is 391274682511. The reversal of 391274682490 is 94286472193.

It can be written as a sum of positive squares in 4 ways, for example, as 348379716169 + 42894966321 = 590237^2 + 207111^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3058021 + ... + 3183400.

Almost surely, 2^391274682490 is an apocalyptic number.

391274682490 is a deficient number, since it is larger than the sum of its proper divisors (313132204430).

391274682490 is a wasteful number, since it uses less digits than its factorization.

391274682490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247697.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 391274682490 in words is "three hundred ninety-one billion, two hundred seventy-four million, six hundred eighty-two thousand, four hundred ninety".