87745289748479 has 4 divisors (see below), whose sum is σ = 95722134271080. Its totient is φ = 79768445225880.

The previous prime is 87745289748451. The next prime is 87745289748509. The reversal of 87745289748479 is 97484798254778.

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

It is a cyclic number.

It is not a de Polignac number, because 87745289748479 - 2²⁰ = 87745288699903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87745289748394 and 87745289748403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87745289748079) 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, 3988422261284 + ... + 3988422261305.

It is an arithmetic number, because the mean of its divisors is an integer number (23930533567770).

Almost surely, 2^{87745289748479} is an apocalyptic number.

87745289748479 is a deficient number, since it is larger than the sum of its proper divisors (7976844522601).

87745289748479 is a wasteful number, since it uses less digits than its factorization.

87745289748479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7976844522600.

The product of its digits is 63727534080, while the sum is 89.

The spelling of 87745289748479 in words is "eighty-seven trillion, seven hundred forty-five billion, two hundred eighty-nine million, seven hundred forty-eight thousand, four hundred seventy-nine".