646465344742 has 16 divisors (see below), whose sum is σ = 1123407489312. Its totient is φ = 273261280320.

The previous prime is 646465344727. The next prime is 646465344779. The reversal of 646465344742 is 247443564646.

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, 316273609 + ... + 316275652.

It is an arithmetic number, because the mean of its divisors is an integer number (70212968082).

Almost surely, 2^646465344742 is an apocalyptic number.

646465344742 is a deficient number, since it is larger than the sum of its proper divisors (476942144570).

646465344742 is a wasteful number, since it uses less digits than its factorization.

646465344742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632549343.

The product of its digits is 46448640, while the sum is 55.

The spelling of 646465344742 in words is "six hundred forty-six billion, four hundred sixty-five million, three hundred forty-four thousand, seven hundred forty-two".