6115477778 has 4 divisors (see below), whose sum is σ = 9173216670. Its totient is φ = 3057738888.

The previous prime is 6115477733. The next prime is 6115477789. The reversal of 6115477778 is 8777745116.

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., 6057975889 + 57501889 = 77833^2 + 7583^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1528869443 + ... + 1528869446.

Almost surely, 2^6115477778 is an apocalyptic number.

6115477778 is a deficient number, since it is larger than the sum of its proper divisors (3057738892).

6115477778 is a wasteful number, since it uses less digits than its factorization.

6115477778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057738891.

The product of its digits is 2304960, while the sum is 53.

The square root of 6115477778 is about 78201.5203049148. The cubic root of 6115477778 is about 1828.7042075544.

The spelling of 6115477778 in words is "six billion, one hundred fifteen million, four hundred seventy-seven thousand, seven hundred seventy-eight".