1672656261 has 8 divisors (see below), whose sum is σ = 2230598304. Its totient is φ = 1114909200.

The previous prime is 1672656221. The next prime is 1672656311. The reversal of 1672656261 is 1626562761.

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

It is not a de Polignac number, because 1672656261 - 2⁷ = 1672656133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672656221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27391 + ... + 63996.

It is an arithmetic number, because the mean of its divisors is an integer number (278824788).

Almost surely, 2^1672656261 is an apocalyptic number.

It is an amenable number.

1672656261 is a deficient number, since it is larger than the sum of its proper divisors (557942043).

1672656261 is an equidigital number, since it uses as much as digits as its factorization.

1672656261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97491.

The product of its digits is 181440, while the sum is 42.

The square root of 1672656261 is about 40898.1205069377. The cubic root of 1672656261 is about 1187.0496933588.

The spelling of 1672656261 in words is "one billion, six hundred seventy-two million, six hundred fifty-six thousand, two hundred sixty-one".