6261778867 has 4 divisors (see below), whose sum is σ = 6264066096. Its totient is φ = 6259491640.

The previous prime is 6261778829. The next prime is 6261778907. The reversal of 6261778867 is 7688771626.

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 6261778867 - 2⁷ = 6261778739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6261778067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1139503 + ... + 1144984.

It is an arithmetic number, because the mean of its divisors is an integer number (1566016524).

Almost surely, 2^6261778867 is an apocalyptic number.

6261778867 is a deficient number, since it is larger than the sum of its proper divisors (2287229).

6261778867 is a wasteful number, since it uses less digits than its factorization.

6261778867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287228.

The product of its digits is 9483264, while the sum is 58.

The square root of 6261778867 is about 79131.4025340130. The cubic root of 6261778867 is about 1843.1721889295.

The spelling of 6261778867 in words is "six billion, two hundred sixty-one million, seven hundred seventy-eight thousand, eight hundred sixty-seven".