8861421538 has 8 divisors (see below), whose sum is σ = 13297234860. Its totient is φ = 4429009920.

The previous prime is 8861421521. The next prime is 8861421539. The reversal of 8861421538 is 8351241688.

It can be written as a sum of positive squares in 2 ways, for example, as 8550146089 + 311275449 = 92467^2 + 17643^2 .

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 (8861421539) 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, 843903 + ... + 854338.

Almost surely, 2^8861421538 is an apocalyptic number.

8861421538 is a deficient number, since it is larger than the sum of its proper divisors (4435813322).

8861421538 is a wasteful number, since it uses less digits than its factorization.

8861421538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700852.

The product of its digits is 368640, while the sum is 46.

The square root of 8861421538 is about 94135.1238274004. The cubic root of 8861421538 is about 2069.3524496321.

The spelling of 8861421538 in words is "eight billion, eight hundred sixty-one million, four hundred twenty-one thousand, five hundred thirty-eight".