646351220154004 has 24 divisors (see below), whose sum is σ = 1142951695441920. Its totient is φ = 319806676125216.

The previous prime is 646351220153993. The next prime is 646351220154047. The reversal of 646351220154004 is 400451022153646.

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, 1635207172 + ... + 1635602395.

It is an arithmetic number, because the mean of its divisors is an integer number (47622987310080).

Almost surely, 2^{646351220154004} is an apocalyptic number.

It is an amenable number.

646351220154004 is a deficient number, since it is larger than the sum of its proper divisors (496600475287916).

646351220154004 is a wasteful number, since it uses less digits than its factorization.

646351220154004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270810087 (or 3270810085 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 646351220154004 in words is "six hundred forty-six trillion, three hundred fifty-one billion, two hundred twenty million, one hundred fifty-four thousand, four".