646166461546 has 16 divisors (see below), whose sum is σ = 1020278482560. Its totient is φ = 306074155680.

The previous prime is 646166461541. The next prime is 646166461547. The reversal of 646166461546 is 645164661646.

It is a happy number.

646166461546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×646166461546³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (646166461541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4855231 + ... + 4986541.

It is an arithmetic number, because the mean of its divisors is an integer number (63767405160).

Almost surely, 2^646166461546 is an apocalyptic number.

646166461546 is a deficient number, since it is larger than the sum of its proper divisors (374112021014).

646166461546 is a wasteful number, since it uses less digits than its factorization.

646166461546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260829.

The product of its digits is 14929920, while the sum is 55.

The spelling of 646166461546 in words is "six hundred forty-six billion, one hundred sixty-six million, four hundred sixty-one thousand, five hundred forty-six".