4726657638 has 24 divisors (see below), whose sum is σ = 10620392328. Its totient is φ = 1575552384.

The previous prime is 4726657633. The next prime is 4726657673. The reversal of 4726657638 is 8367566274.

4726657638 is a `hidden beast` number, since 4 + 7 + 2 + 66 + 576 + 3 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4726657633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4862331 + ... + 4863302.

It is an arithmetic number, because the mean of its divisors is an integer number (442516347).

Almost surely, 2^4726657638 is an apocalyptic number.

4726657638 is an abundant number, since it is smaller than the sum of its proper divisors (5893734690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4726657638 is an equidigital number, since it uses as much as digits as its factorization.

4726657638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9725650 (or 9725638 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The square root of 4726657638 is about 68750.6919092455. The cubic root of 4726657638 is about 1678.2296210046.

The spelling of 4726657638 in words is "four billion, seven hundred twenty-six million, six hundred fifty-seven thousand, six hundred thirty-eight".