77990000001 has 8 divisors (see below), whose sum is σ = 104745693984. Its totient is φ = 51613819680.

The previous prime is 77989999999. The next prime is 77990000021. The reversal of 77990000001 is 10000009977.

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

It is not a de Polignac number, because 77990000001 - 2¹ = 77989999999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77990000021) 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, 94877935 + ... + 94878756.

It is an arithmetic number, because the mean of its divisors is an integer number (13093211748).

Almost surely, 2^77990000001 is an apocalyptic number.

It is an amenable number.

77990000001 is a deficient number, since it is larger than the sum of its proper divisors (26755693983).

77990000001 is a wasteful number, since it uses less digits than its factorization.

77990000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189756831.

The product of its (nonzero) digits is 3969, while the sum is 33.

Adding to 77990000001 its reverse (10000009977), we get a palindrome (87990009978).

The spelling of 77990000001 in words is "seventy-seven billion, nine hundred ninety million, one", and thus it is an aban number.