87280726457 has 4 divisors (see below), whose sum is σ = 87293218176. Its totient is φ = 87268234740.

The previous prime is 87280726433. The next prime is 87280726483. The reversal of 87280726457 is 75462708278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87280726457 - 2³² = 82985759161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87280726657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6235373 + ... + 6249354.

It is an arithmetic number, because the mean of its divisors is an integer number (21823304544).

Almost surely, 2^87280726457 is an apocalyptic number.

It is an amenable number.

87280726457 is a deficient number, since it is larger than the sum of its proper divisors (12491719).

87280726457 is a wasteful number, since it uses less digits than its factorization.

87280726457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12491718.

The product of its (nonzero) digits is 10536960, while the sum is 56.

The spelling of 87280726457 in words is "eighty-seven billion, two hundred eighty million, seven hundred twenty-six thousand, four hundred fifty-seven".