646311534 has 32 divisors (see below), whose sum is σ = 1416489984. Its totient is φ = 194969280.

The previous prime is 646311527. The next prime is 646311539. The reversal of 646311534 is 435113646.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 646311495 and 646311504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646311539) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7239 + ... + 36674.

It is an arithmetic number, because the mean of its divisors is an integer number (44265312).

Almost surely, 2^646311534 is an apocalyptic number.

646311534 is an abundant number, since it is smaller than the sum of its proper divisors (770178450).

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

646311534 is a wasteful number, since it uses less digits than its factorization.

646311534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44152.

The product of its digits is 25920, while the sum is 33.

The square root of 646311534 is about 25422.6578862242. The cubic root of 646311534 is about 864.5974867771.

The spelling of 646311534 in words is "six hundred forty-six million, three hundred eleven thousand, five hundred thirty-four".