4981986538 has 16 divisors (see below), whose sum is σ = 7618552200. Its totient is φ = 2442525696.

The previous prime is 4981986521. The next prime is 4981986539. The reversal of 4981986538 is 8356891894.

It can be written as a sum of positive squares in 4 ways, for example, as 3811457169 + 1170529369 = 61737^2 + 34213^2 .

It is not an unprimeable number, because it can be changed into a prime (4981986539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175138 + ... + 201586.

Almost surely, 2^4981986538 is an apocalyptic number.

4981986538 is a deficient number, since it is larger than the sum of its proper divisors (2636565662).

4981986538 is a wasteful number, since it uses less digits than its factorization.

4981986538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28281.

The product of its digits is 14929920, while the sum is 61.

The square root of 4981986538 is about 70583.1887774986. The cubic root of 4981986538 is about 1707.9199698967.

The spelling of 4981986538 in words is "four billion, nine hundred eighty-one million, nine hundred eighty-six thousand, five hundred thirty-eight".