6619642381 has 8 divisors (see below), whose sum is σ = 7454377728. Its totient is φ = 5823732000.

The previous prime is 6619642357. The next prime is 6619642423. The reversal of 6619642381 is 1832469166.

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 6619642381 - 2²³ = 6611253773 is a prime.

It is a super-2 number, since 2×6619642381² = 87639330504662698322, 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 (6619642301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9705880 + ... + 9706561.

It is an arithmetic number, because the mean of its divisors is an integer number (931797216).

Almost surely, 2^6619642381 is an apocalyptic number.

It is an amenable number.

6619642381 is a deficient number, since it is larger than the sum of its proper divisors (834735347).

6619642381 is a wasteful number, since it uses less digits than its factorization.

6619642381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19412483.

The product of its digits is 373248, while the sum is 46.

The square root of 6619642381 is about 81361.1847320330. The cubic root of 6619642381 is about 1877.6364576059.

The spelling of 6619642381 in words is "six billion, six hundred nineteen million, six hundred forty-two thousand, three hundred eighty-one".