6252786721 has 4 divisors (see below), whose sum is σ = 6331936000. Its totient is φ = 6173637444.

The previous prime is 6252786667. The next prime is 6252786733. The reversal of 6252786721 is 1276872526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1276872526 = 2 ⋅638436263.

It is a cyclic number.

It is not a de Polignac number, because 6252786721 - 2¹³ = 6252778529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6252786121) 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, 39574521 + ... + 39574678.

It is an arithmetic number, because the mean of its divisors is an integer number (1582984000).

Almost surely, 2^6252786721 is an apocalyptic number.

It is an amenable number.

6252786721 is a deficient number, since it is larger than the sum of its proper divisors (79149279).

6252786721 is an equidigital number, since it uses as much as digits as its factorization.

6252786721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79149278.

The product of its digits is 564480, while the sum is 46.

The square root of 6252786721 is about 79074.5643111614. The cubic root of 6252786721 is about 1842.2894784530.

The spelling of 6252786721 in words is "six billion, two hundred fifty-two million, seven hundred eighty-six thousand, seven hundred twenty-one".