4993167521 has 4 divisors (see below), whose sum is σ = 4993319700. Its totient is φ = 4993015344.

The previous prime is 4993167503. The next prime is 4993167527. The reversal of 4993167521 is 1257613994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4534136896 + 459030625 = 67336^2 + 21425^2 .

It is a cyclic number.

It is not a de Polignac number, because 4993167521 - 2⁶ = 4993167457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4993167527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4286 + ... + 100023.

It is an arithmetic number, because the mean of its divisors is an integer number (1248329925).

Almost surely, 2^4993167521 is an apocalyptic number.

It is an amenable number.

4993167521 is a deficient number, since it is larger than the sum of its proper divisors (152179).

4993167521 is a wasteful number, since it uses less digits than its factorization.

4993167521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152178.

The product of its digits is 408240, while the sum is 47.

The square root of 4993167521 is about 70662.3486801847. The cubic root of 4993167521 is about 1709.1966999733.

The spelling of 4993167521 in words is "four billion, nine hundred ninety-three million, one hundred sixty-seven thousand, five hundred twenty-one".