6530194778 has 16 divisors (see below), whose sum is σ = 10334135520. Its totient is φ = 3086259696.

The previous prime is 6530194757. The next prime is 6530194789. The reversal of 6530194778 is 8774910356.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177125 + ... + 210792.

It is an arithmetic number, because the mean of its divisors is an integer number (645883470).

Almost surely, 2^6530194778 is an apocalyptic number.

6530194778 is a deficient number, since it is larger than the sum of its proper divisors (3803940742).

6530194778 is a wasteful number, since it uses less digits than its factorization.

6530194778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388381.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 6530194778 is about 80809.6205782455. The cubic root of 6530194778 is about 1869.1409189416.

The spelling of 6530194778 in words is "six billion, five hundred thirty million, one hundred ninety-four thousand, seven hundred seventy-eight".