46645821 has 8 divisors (see below), whose sum is σ = 69104960. Its totient is φ = 31097196.

The previous prime is 46645811. The next prime is 46645843. The reversal of 46645821 is 12854664.

46645821 is a `hidden beast` number, since 4 + 6 + 645 + 8 + 2 + 1 = 666.

It is not a de Polignac number, because 46645821 - 2¹⁵ = 46613053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46645801) 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, 863785 + ... + 863838.

It is an arithmetic number, because the mean of its divisors is an integer number (8638120).

Almost surely, 2^46645821 is an apocalyptic number.

It is an amenable number.

46645821 is a deficient number, since it is larger than the sum of its proper divisors (22459139).

46645821 is a wasteful number, since it uses less digits than its factorization.

46645821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727632 (or 1727626 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 46645821 is about 6829.7745936451. The cubic root of 46645821 is about 359.9738175403.

The spelling of 46645821 in words is "forty-six million, six hundred forty-five thousand, eight hundred twenty-one".