6429272261 has 4 divisors (see below), whose sum is σ = 6492928524. Its totient is φ = 6365616000.

The previous prime is 6429272233. The next prime is 6429272263. The reversal of 6429272261 is 1622729246.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5684255236 + 745017025 = 75394^2 + 27295^2 .

It is a cyclic number.

It is not a de Polignac number, because 6429272261 - 2¹⁰ = 6429271237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6429272263) 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, 31827980 + ... + 31828181.

It is an arithmetic number, because the mean of its divisors is an integer number (1623232131).

Almost surely, 2^6429272261 is an apocalyptic number.

It is an amenable number.

6429272261 is a deficient number, since it is larger than the sum of its proper divisors (63656263).

6429272261 is a wasteful number, since it uses less digits than its factorization.

6429272261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63656262.

The product of its digits is 145152, while the sum is 41.

The square root of 6429272261 is about 80182.7429126742. The cubic root of 6429272261 is about 1859.4618496508.

The spelling of 6429272261 in words is "six billion, four hundred twenty-nine million, two hundred seventy-two thousand, two hundred sixty-one".