4021523745 has 48 divisors (see below), whose sum is σ = 6749713152. Its totient is φ = 2042488320.

The previous prime is 4021523729. The next prime is 4021523801. The reversal of 4021523745 is 5473251204.

It is not a de Polignac number, because 4021523745 - 2⁴ = 4021523729 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10781379 + ... + 10781751.

It is an arithmetic number, because the mean of its divisors is an integer number (140619024).

Almost surely, 2^4021523745 is an apocalyptic number.

It is an amenable number.

4021523745 is a deficient number, since it is larger than the sum of its proper divisors (2728189407).

4021523745 is an equidigital number, since it uses as much as digits as its factorization.

4021523745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 4021523745 is about 63415.4850568850. The cubic root of 4021523745 is about 1590.2431948723.

Adding to 4021523745 its reverse (5473251204), we get a palindrome (9494774949).

The spelling of 4021523745 in words is "four billion, twenty-one million, five hundred twenty-three thousand, seven hundred forty-five".