80278640901 has 6 divisors (see below), whose sum is σ = 115958036870. Its totient is φ = 53519093928.

The previous prime is 80278640899. The next prime is 80278640927. The reversal of 80278640901 is 10904687208.

It can be written as a sum of positive squares in only one way, i.e., 79595079876 + 683561025 = 282126^2 + 26145^2 .

It is not a de Polignac number, because 80278640901 - 2¹ = 80278640899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80278240901) 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, 4459924486 + ... + 4459924503.

Almost surely, 2^80278640901 is an apocalyptic number.

It is an amenable number.

80278640901 is a deficient number, since it is larger than the sum of its proper divisors (35679395969).

80278640901 is a wasteful number, since it uses less digits than its factorization.

80278640901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8919848995 (or 8919848992 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 80278640901 in words is "eighty billion, two hundred seventy-eight million, six hundred forty thousand, nine hundred one".