46639799721 has 6 divisors (see below), whose sum is σ = 67368599610. Its totient is φ = 31093199808.

The previous prime is 46639799711. The next prime is 46639799729. The reversal of 46639799721 is 12799793664.

46639799721 is a `hidden beast` number, since 466 + 39 + 79 + 9 + 72 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45449549721 + 1190250000 = 213189^2 + 34500^2 .

It is not a de Polignac number, because 46639799721 - 2²¹ = 46637702569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (46639799729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2591099976 + ... + 2591099993.

It is an arithmetic number, because the mean of its divisors is an integer number (11228099935).

Almost surely, 2^46639799721 is an apocalyptic number.

It is an amenable number.

46639799721 is a deficient number, since it is larger than the sum of its proper divisors (20728799889).

46639799721 is a wasteful number, since it uses less digits than its factorization.

46639799721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5182199975 (or 5182199972 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 63.

The spelling of 46639799721 in words is "forty-six billion, six hundred thirty-nine million, seven hundred ninety-nine thousand, seven hundred twenty-one".