4927121986 has 24 divisors (see below), whose sum is σ = 7536631284. Its totient is φ = 2415614400.

The previous prime is 4927121981. The next prime is 4927122023. The reversal of 4927121986 is 6891217294.

It can be written as a sum of positive squares in 6 ways, for example, as 4546130625 + 380991361 = 67425^2 + 19519^2 .

It is not an unprimeable number, because it can be changed into a prime (4927121981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2398936 + ... + 2400988.

Almost surely, 2^4927121986 is an apocalyptic number.

4927121986 is a deficient number, since it is larger than the sum of its proper divisors (2609509298).

4927121986 is a wasteful number, since it uses less digits than its factorization.

4927121986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374 (or 2265 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 4927121986 is about 70193.4611342111. The cubic root of 4927121986 is about 1701.6272752900.

The spelling of 4927121986 in words is "four billion, nine hundred twenty-seven million, one hundred twenty-one thousand, nine hundred eighty-six".