1672655451 has 4 divisors (see below), whose sum is σ = 2230207272. Its totient is φ = 1115103632.

The previous prime is 1672655407. The next prime is 1672655471. The reversal of 1672655451 is 1545562761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1672655451 - 2¹⁰ = 1672654427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1672655471) 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 3 ways as a sum of consecutive naturals, for example, 278775906 + ... + 278775911.

It is an arithmetic number, because the mean of its divisors is an integer number (557551818).

Almost surely, 2^1672655451 is an apocalyptic number.

1672655451 is a deficient number, since it is larger than the sum of its proper divisors (557551821).

1672655451 is an equidigital number, since it uses as much as digits as its factorization.

1672655451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557551820.

The product of its digits is 252000, while the sum is 42.

The square root of 1672655451 is about 40898.1106042810. The cubic root of 1672655451 is about 1187.0495017453.

The spelling of 1672655451 in words is "one billion, six hundred seventy-two million, six hundred fifty-five thousand, four hundred fifty-one".