4021624649 has 4 divisors (see below), whose sum is σ = 4596142464. Its totient is φ = 3447106836.

The previous prime is 4021624627. The next prime is 4021624661. The reversal of 4021624649 is 9464261204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4021624649 - 2⁸ = 4021624393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021624679) 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, 287258897 + ... + 287258910.

It is an arithmetic number, because the mean of its divisors is an integer number (1149035616).

Almost surely, 2^4021624649 is an apocalyptic number.

It is an amenable number.

4021624649 is a deficient number, since it is larger than the sum of its proper divisors (574517815).

4021624649 is an equidigital number, since it uses as much as digits as its factorization.

4021624649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574517814.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 4021624649 is about 63416.2806304501. The cubic root of 4021624649 is about 1590.2564950182.

The spelling of 4021624649 in words is "four billion, twenty-one million, six hundred twenty-four thousand, six hundred forty-nine".