646749140282 has 32 divisors (see below), whose sum is σ = 1132462080000. Its totient is φ = 271242549360.

The previous prime is 646749140273. The next prime is 646749140321. The reversal of 646749140282 is 282041947646.

It is a super-2 number, since 2×646749140282² (a number of 24 digits) contains 22 as substring.

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, 4868807 + ... + 4999877.

It is an arithmetic number, because the mean of its divisors is an integer number (35389440000).

Almost surely, 2^646749140282 is an apocalyptic number.

646749140282 is a deficient number, since it is larger than the sum of its proper divisors (485712939718).

646749140282 is a wasteful number, since it uses less digits than its factorization.

646749140282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138626.

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 646749140282 in words is "six hundred forty-six billion, seven hundred forty-nine million, one hundred forty thousand, two hundred eighty-two".