87722037281513 has 4 divisors (see below), whose sum is σ = 92882157121620. Its totient is φ = 82561917441408.

The previous prime is 87722037281491. The next prime is 87722037281519. The reversal of 87722037281513 is 31518273022778.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80602383161689 + 7119654119824 = 8977883^2 + 2668268^2 .

It is a cyclic number.

It is not a de Polignac number, because 87722037281513 - 2⁸ = 87722037281257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87722037281519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2580059920028 + ... + 2580059920061.

It is an arithmetic number, because the mean of its divisors is an integer number (23220539280405).

Almost surely, 2^{87722037281513} is an apocalyptic number.

It is an amenable number.

87722037281513 is a deficient number, since it is larger than the sum of its proper divisors (5160119840107).

87722037281513 is a wasteful number, since it uses less digits than its factorization.

87722037281513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160119840106.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 87722037281513 in words is "eighty-seven trillion, seven hundred twenty-two billion, thirty-seven million, two hundred eighty-one thousand, five hundred thirteen".