4072361581 has 4 divisors (see below), whose sum is σ = 4076953632. Its totient is φ = 4067769532.

The previous prime is 4072361537. The next prime is 4072361591. The reversal of 4072361581 is 1851632704.

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 4072361581 - 2¹⁹ = 4071837293 is a prime.

It is a super-2 number, since 2×4072361581² = 33168257692809639122, which contains 22 as substring.

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 4072361581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4072361521) 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, 2294695 + ... + 2296468.

It is an arithmetic number, because the mean of its divisors is an integer number (1019238408).

Almost surely, 2^4072361581 is an apocalyptic number.

It is an amenable number.

4072361581 is a deficient number, since it is larger than the sum of its proper divisors (4592051).

4072361581 is an equidigital number, since it uses as much as digits as its factorization.

4072361581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592050.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 4072361581 is about 63815.0576353262. The cubic root of 4072361581 is about 1596.9161408109.

The spelling of 4072361581 in words is "four billion, seventy-two million, three hundred sixty-one thousand, five hundred eighty-one".