646894911731126 has 16 divisors (see below), whose sum is σ = 972838642291200. Its totient is φ = 322616289363648.

The previous prime is 646894911731077. The next prime is 646894911731147. The reversal of 646894911731126 is 621137119498646.

It is a congruent number.

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, 229866230 + ... + 232663433.

It is an arithmetic number, because the mean of its divisors is an integer number (60802415143200).

Almost surely, 2^{646894911731126} is an apocalyptic number.

646894911731126 is a deficient number, since it is larger than the sum of its proper divisors (325943730560074).

646894911731126 is a wasteful number, since it uses less digits than its factorization.

646894911731126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462531463.

The product of its digits is 94058496, while the sum is 68.

The spelling of 646894911731126 in words is "six hundred forty-six trillion, eight hundred ninety-four billion, nine hundred eleven million, seven hundred thirty-one thousand, one hundred twenty-six".