1672421611 has 32 divisors (see below), whose sum is σ = 2003904000. Its totient is φ = 1366053120.

The previous prime is 1672421551. The next prime is 1672421627. The reversal of 1672421611 is 1161242761.

It is a cyclic number.

It is not a de Polignac number, because 1672421611 - 2⁹ = 1672421099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1672421651) 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 31 ways as a sum of consecutive naturals, for example, 4791865 + ... + 4792213.

It is an arithmetic number, because the mean of its divisors is an integer number (62622000).

Almost surely, 2^1672421611 is an apocalyptic number.

1672421611 is a deficient number, since it is larger than the sum of its proper divisors (331482389).

1672421611 is a wasteful number, since it uses less digits than its factorization.

1672421611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its digits is 4032, while the sum is 31.

The square root of 1672421611 is about 40895.2516925865. The cubic root of 1672421611 is about 1186.9941820058.

The spelling of 1672421611 in words is "one billion, six hundred seventy-two million, four hundred twenty-one thousand, six hundred eleven".