19680088977 has 6 divisors (see below), whose sum is σ = 28426795202. Its totient is φ = 13120059312.

The previous prime is 19680088973. The next prime is 19680088991. The reversal of 19680088977 is 77988008691.

It can be written as a sum of positive squares in only one way, i.e., 19412570241 + 267518736 = 139329^2 + 16356^2 .

It is not a de Polignac number, because 19680088977 - 2² = 19680088973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19680088973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1093338268 + ... + 1093338285.

Almost surely, 2^19680088977 is an apocalyptic number.

It is an amenable number.

19680088977 is a deficient number, since it is larger than the sum of its proper divisors (8746706225).

19680088977 is a wasteful number, since it uses less digits than its factorization.

19680088977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186676559 (or 2186676556 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The spelling of 19680088977 in words is "nineteen billion, six hundred eighty million, eighty-eight thousand, nine hundred seventy-seven".