8254549978 has 8 divisors (see below), whose sum is σ = 12615444468. Its totient is φ = 4049401824.

The previous prime is 8254549973. The next prime is 8254549991. The reversal of 8254549978 is 8799454528.

It can be written as a sum of positive squares in 2 ways, for example, as 7214293969 + 1040256009 = 84937^2 + 32253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (8254549973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38936451 + ... + 38936662.

Almost surely, 2^8254549978 is an apocalyptic number.

8254549978 is a deficient number, since it is larger than the sum of its proper divisors (4360894490).

8254549978 is a wasteful number, since it uses less digits than its factorization.

8254549978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77873168.

The product of its digits is 29030400, while the sum is 61.

The square root of 8254549978 is about 90854.5539750210. The cubic root of 8254549978 is about 2020.9914077636.

The spelling of 8254549978 in words is "eight billion, two hundred fifty-four million, five hundred forty-nine thousand, nine hundred seventy-eight".