8461808738 has 4 divisors (see below), whose sum is σ = 12692713110. Its totient is φ = 4230904368.

The previous prime is 8461808713. The next prime is 8461808741. The reversal of 8461808738 is 8378081648.

It is a happy number.

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., 8374629169 + 87179569 = 91513^2 + 9337^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8461808738.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2115452183 + ... + 2115452186.

Almost surely, 2^8461808738 is an apocalyptic number.

8461808738 is a deficient number, since it is larger than the sum of its proper divisors (4230904372).

8461808738 is a wasteful number, since it uses less digits than its factorization.

8461808738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4230904371.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The square root of 8461808738 is about 91988.0901965032. The cubic root of 8461808738 is about 2037.7664213473.

The spelling of 8461808738 in words is "eight billion, four hundred sixty-one million, eight hundred eight thousand, seven hundred thirty-eight".