3081921646 has 8 divisors (see below), whose sum is σ = 4623980184. Its totient is φ = 1540594920.

The previous prime is 3081921643. The next prime is 3081921679. The reversal of 3081921646 is 6461291803.

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

It is a junction number, because it is equal to n+sod(n) for n = 3081921599 and 3081921608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3081921643) 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, 172300 + ... + 189343.

It is an arithmetic number, because the mean of its divisors is an integer number (577997523).

Almost surely, 2^3081921646 is an apocalyptic number.

3081921646 is a deficient number, since it is larger than the sum of its proper divisors (1542058538).

3081921646 is a wasteful number, since it uses less digits than its factorization.

3081921646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365906.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 3081921646 is about 55515.0578311867. The cubic root of 3081921646 is about 1455.2597948180.

The spelling of 3081921646 in words is "three billion, eighty-one million, nine hundred twenty-one thousand, six hundred forty-six".