3781955613 has 8 divisors (see below), whose sum is σ = 5043574368. Its totient is φ = 2520820304.

The previous prime is 3781955591. The next prime is 3781955621. The reversal of 3781955613 is 3165591873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3781955613 - 2⁵ = 3781955581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781955623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102195 + ... + 134192.

It is an arithmetic number, because the mean of its divisors is an integer number (630446796).

Almost surely, 2^3781955613 is an apocalyptic number.

It is an amenable number.

3781955613 is a deficient number, since it is larger than the sum of its proper divisors (1261618755).

3781955613 is a wasteful number, since it uses less digits than its factorization.

3781955613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241723.

The product of its digits is 680400, while the sum is 48.

The square root of 3781955613 is about 61497.6065631826. The cubic root of 3781955613 is about 1558.0168220447.

The spelling of 3781955613 in words is "three billion, seven hundred eighty-one million, nine hundred fifty-five thousand, six hundred thirteen".