80737999409 has 8 divisors (see below), whose sum is σ = 80876535912. Its totient is φ = 80599509760.

The previous prime is 80737999339. The next prime is 80737999451. The reversal of 80737999409 is 90499973708.

It can be written as a sum of positive squares in 4 ways, for example, as 73479184 + 80664520225 = 8572^2 + 284015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80737999409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80737599409) 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, 5826329 + ... + 5840169.

It is an arithmetic number, because the mean of its divisors is an integer number (10109566989).

Almost surely, 2^80737999409 is an apocalyptic number.

It is an amenable number.

80737999409 is a deficient number, since it is larger than the sum of its proper divisors (138536503).

80737999409 is a wasteful number, since it uses less digits than its factorization.

80737999409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23427.

The product of its (nonzero) digits is 30862944, while the sum is 65.

The spelling of 80737999409 in words is "eighty billion, seven hundred thirty-seven million, nine hundred ninety-nine thousand, four hundred nine".