4021345577 has 4 divisors (see below), whose sum is σ = 4056932820. Its totient is φ = 3985758336.

The previous prime is 4021345571. The next prime is 4021345589. The reversal of 4021345577 is 7755431204.

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 593945641 + 3427399936 = 24371^2 + 58544^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021345577 - 2¹⁰ = 4021344553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4021345577.

It is not an unprimeable number, because it can be changed into a prime (4021345571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17793452 + ... + 17793677.

It is an arithmetic number, because the mean of its divisors is an integer number (1014233205).

Almost surely, 2^4021345577 is an apocalyptic number.

It is an amenable number.

4021345577 is a deficient number, since it is larger than the sum of its proper divisors (35587243).

4021345577 is a wasteful number, since it uses less digits than its factorization.

4021345577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35587242.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 4021345577 is about 63414.0802740212. The cubic root of 4021345577 is about 1590.2197100233.

The spelling of 4021345577 in words is "four billion, twenty-one million, three hundred forty-five thousand, five hundred seventy-seven".