1631272866 has 8 divisors (see below), whose sum is σ = 3262545744. Its totient is φ = 543757620.

The previous prime is 1631272831. The next prime is 1631272871. The reversal of 1631272866 is 6682721361.

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

1631272866 is an admirable number.

It is a super-2 number, since 2×1631272866² = 5322102326695707912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135939400 + ... + 135939411.

It is an arithmetic number, because the mean of its divisors is an integer number (407818218).

Almost surely, 2^1631272866 is an apocalyptic number.

1631272866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1631272866 is a wasteful number, since it uses less digits than its factorization.

1631272866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271878816.

The product of its digits is 145152, while the sum is 42.

The square root of 1631272866 is about 40389.0191264903. The cubic root of 1631272866 is about 1177.1781817146.

The spelling of 1631272866 in words is "one billion, six hundred thirty-one million, two hundred seventy-two thousand, eight hundred sixty-six".