80078773009 has 4 divisors (see below), whose sum is σ = 83560458816. Its totient is φ = 76597087204.

The previous prime is 80078772979. The next prime is 80078773043. The reversal of 80078773009 is 90037787008.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80078773009 - 2³¹ = 77931289361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80078773069) 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, 1740842869 + ... + 1740842914.

It is an arithmetic number, because the mean of its divisors is an integer number (20890114704).

Almost surely, 2^80078773009 is an apocalyptic number.

It is an amenable number.

80078773009 is a deficient number, since it is larger than the sum of its proper divisors (3481685807).

80078773009 is a wasteful number, since it uses less digits than its factorization.

80078773009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3481685806.

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 80078773009 in words is "eighty billion, seventy-eight million, seven hundred seventy-three thousand, nine".