8139966450 has 288 divisors, whose sum is σ = 25711687680. Its totient is φ = 1667952000.

The previous prime is 8139966449. The next prime is 8139966451. The reversal of 8139966450 is 546699318.

It is an interprime number because it is at equal distance from previous prime (8139966449) and next prime (8139966451).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8139966393 and 8139966402.

It is not an unprimeable number, because it can be changed into a prime (8139966451) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10036545 + ... + 10037355.

Almost surely, 2^8139966450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8139966450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12855843840).

8139966450 is an abundant number, since it is smaller than the sum of its proper divisors (17571721230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8139966450 is a wasteful number, since it uses less digits than its factorization.

8139966450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 8139966450 is about 90221.7626185612. The cubic root of 8139966450 is about 2011.5965014533.

The spelling of 8139966450 in words is "eight billion, one hundred thirty-nine million, nine hundred sixty-six thousand, four hundred fifty".