646455344415 has 16 divisors (see below), whose sum is σ = 1079299358208. Its totient is φ = 329785914656.

The previous prime is 646455344393. The next prime is 646455344441. The reversal of 646455344415 is 514443554646.

It is a cyclic number.

It is not a de Polignac number, because 646455344415 - 2⁷ = 646455344287 is a prime.

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, 936891459 + ... + 936892148.

It is an arithmetic number, because the mean of its divisors is an integer number (67456209888).

Almost surely, 2^646455344415 is an apocalyptic number.

646455344415 is a deficient number, since it is larger than the sum of its proper divisors (432844013793).

646455344415 is a wasteful number, since it uses less digits than its factorization.

646455344415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873783638.

The product of its digits is 13824000, while the sum is 51.

The spelling of 646455344415 in words is "six hundred forty-six billion, four hundred fifty-five million, three hundred forty-four thousand, four hundred fifteen".