6261906578 has 4 divisors (see below), whose sum is σ = 9392859870. Its totient is φ = 3130953288.

The previous prime is 6261906571. The next prime is 6261906587. The reversal of 6261906578 is 8756091626.

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

It can be written as a sum of positive squares in only one way, i.e., 4608101689 + 1653804889 = 67883^2 + 40667^2 .

It is a super-2 number, since 2×6261906578² = 78422947983199340168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6261906571) 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 as a sum of consecutive naturals, namely, 1565476643 + ... + 1565476646.

Almost surely, 2^6261906578 is an apocalyptic number.

6261906578 is a deficient number, since it is larger than the sum of its proper divisors (3130953292).

6261906578 is a wasteful number, since it uses less digits than its factorization.

6261906578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130953291.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 6261906578 is about 79132.2094851395. The cubic root of 6261906578 is about 1843.1847195414.

The spelling of 6261906578 in words is "six billion, two hundred sixty-one million, nine hundred six thousand, five hundred seventy-eight".