6147456778 has 4 divisors (see below), whose sum is σ = 9221185170. Its totient is φ = 3073728388.

The previous prime is 6147456761. The next prime is 6147456779. The reversal of 6147456778 is 8776547416.

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., 5784058809 + 363397969 = 76053^2 + 19063^2 .

It is not an unprimeable number, because it can be changed into a prime (6147456779) 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 as a sum of consecutive naturals, namely, 1536864193 + ... + 1536864196.

Almost surely, 2^6147456778 is an apocalyptic number.

6147456778 is a deficient number, since it is larger than the sum of its proper divisors (3073728392).

6147456778 is a wasteful number, since it uses less digits than its factorization.

6147456778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073728391.

The product of its digits is 7902720, while the sum is 55.

The square root of 6147456778 is about 78405.7190388558. The cubic root of 6147456778 is about 1831.8862152670.

The spelling of 6147456778 in words is "six billion, one hundred forty-seven million, four hundred fifty-six thousand, seven hundred seventy-eight".