646492727294646 has 32 divisors (see below), whose sum is σ = 1294341997141248. Its totient is φ = 215271492035040.

The previous prime is 646492727294521. The next prime is 646492727294651.

646492727294646 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×646492727294646² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402396681 + ... + 404000091.

It is an arithmetic number, because the mean of its divisors is an integer number (40448187410664).

Almost surely, 2^{646492727294646} is an apocalyptic number.

646492727294646 is an abundant number, since it is smaller than the sum of its proper divisors (647849269846602).

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

646492727294646 is a wasteful number, since it uses less digits than its factorization.

646492727294646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673876.

The product of its digits is 10534551552, while the sum is 78.

The spelling of 646492727294646 in words is "six hundred forty-six trillion, four hundred ninety-two billion, seven hundred twenty-seven million, two hundred ninety-four thousand, six hundred forty-six".