3601681381 has 4 divisors (see below), whose sum is σ = 3629175264. Its totient is φ = 3574187500.

The previous prime is 3601681357. The next prime is 3601681423. The reversal of 3601681381 is 1831861063.

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 3601681381 - 2⁷ = 3601681253 is a prime.

It is a super-2 number, since 2×3601681381² = 25944217540484134322, 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 3601681381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3601681301) 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, 13746745 + ... + 13747006.

It is an arithmetic number, because the mean of its divisors is an integer number (907293816).

Almost surely, 2^3601681381 is an apocalyptic number.

It is an amenable number.

3601681381 is a deficient number, since it is larger than the sum of its proper divisors (27493883).

3601681381 is a wasteful number, since it uses less digits than its factorization.

3601681381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27493882.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 3601681381 is about 60014.0098726956. The cubic root of 3601681381 is about 1532.8574310057.

The spelling of 3601681381 in words is "three billion, six hundred one million, six hundred eighty-one thousand, three hundred eighty-one".