280478471291 has 4 divisors (see below), whose sum is σ = 280486115184. Its totient is φ = 280470827400.

The previous prime is 280478471261. The next prime is 280478471297. The reversal of 280478471291 is 192174874082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192174874082 = 2 ⋅96087437041.

It is a cyclic number.

It is not a de Polignac number, because 280478471291 - 2¹⁰ = 280478470267 is a prime.

It is a super-2 number, since 2×280478471291² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280478471297) 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, 3766640 + ... + 3840381.

It is an arithmetic number, because the mean of its divisors is an integer number (70121528796).

Almost surely, 2^280478471291 is an apocalyptic number.

280478471291 is a deficient number, since it is larger than the sum of its proper divisors (7643893).

280478471291 is an equidigital number, since it uses as much as digits as its factorization.

280478471291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7643892.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 280478471291 in words is "two hundred eighty billion, four hundred seventy-eight million, four hundred seventy-one thousand, two hundred ninety-one".