4201621649 has 4 divisors (see below), whose sum is σ = 4206491136. Its totient is φ = 4196752164.

The previous prime is 4201621607. The next prime is 4201621681. The reversal of 4201621649 is 9461261024.

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 4201621649 - 2²⁰ = 4200573073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4201621049) 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, 2433449 + ... + 2435174.

It is an arithmetic number, because the mean of its divisors is an integer number (1051622784).

Almost surely, 2^4201621649 is an apocalyptic number.

It is an amenable number.

4201621649 is a deficient number, since it is larger than the sum of its proper divisors (4869487).

4201621649 is an equidigital number, since it uses as much as digits as its factorization.

4201621649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869486.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 4201621649 is about 64819.9170702956. The cubic root of 4201621649 is about 1613.6362712852.

The spelling of 4201621649 in words is "four billion, two hundred one million, six hundred twenty-one thousand, six hundred forty-nine".