3671379581 has 4 divisors (see below), whose sum is σ = 3671513664. Its totient is φ = 3671245500.

The previous prime is 3671379571. The next prime is 3671379601. The reversal of 3671379581 is 1859731763.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1859731763 = 367 ⋅5067389.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3671379581 is a prime.

It is a super-2 number, since 2×3671379581² = 26958056055567471122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3671379571) 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, 9515 + ... + 86216.

It is an arithmetic number, because the mean of its divisors is an integer number (917878416).

Almost surely, 2^3671379581 is an apocalyptic number.

It is an amenable number.

3671379581 is a deficient number, since it is larger than the sum of its proper divisors (134083).

3671379581 is an equidigital number, since it uses as much as digits as its factorization.

3671379581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134082.

The product of its digits is 952560, while the sum is 50.

The square root of 3671379581 is about 60591.9101943486. The cubic root of 3671379581 is about 1542.6820610503.

The spelling of 3671379581 in words is "three billion, six hundred seventy-one million, three hundred seventy-nine thousand, five hundred eighty-one".