280217328347487 has 4 divisors (see below), whose sum is σ = 373623104463320. Its totient is φ = 186811552231656.

The previous prime is 280217328347417. The next prime is 280217328347503. The reversal of 280217328347487 is 784743823712082.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 280217328347487 - 2²⁴ = 280217311570271 is a prime.

It is a super-2 number, since 2×280217328347487² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280217328347417) 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, 46702888057912 + ... + 46702888057917.

It is an arithmetic number, because the mean of its divisors is an integer number (93405776115830).

Almost surely, 2^{280217328347487} is an apocalyptic number.

280217328347487 is a deficient number, since it is larger than the sum of its proper divisors (93405776115833).

280217328347487 is an equidigital number, since it uses as much as digits as its factorization.

280217328347487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93405776115832.

The product of its (nonzero) digits is 202309632, while the sum is 66.

The spelling of 280217328347487 in words is "two hundred eighty trillion, two hundred seventeen billion, three hundred twenty-eight million, three hundred forty-seven thousand, four hundred eighty-seven".