8381565764525 has 24 divisors (see below), whose sum is σ = 10469771186400. Its totient is φ = 6655873298240.

The previous prime is 8381565764489. The next prime is 8381565764531. The reversal of 8381565764525 is 5254675651838.

It is a happy number.

It is not a de Polignac number, because 8381565764525 - 2²⁶ = 8381498655661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4934474 + ... + 6411876.

It is an arithmetic number, because the mean of its divisors is an integer number (436240466100).

Almost surely, 2^{8381565764525} is an apocalyptic number.

It is an amenable number.

8381565764525 is a deficient number, since it is larger than the sum of its proper divisors (2088205421875).

8381565764525 is a wasteful number, since it uses less digits than its factorization.

8381565764525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479085 (or 1479080 counting only the distinct ones).

The product of its digits is 241920000, while the sum is 65.

The spelling of 8381565764525 in words is "eight trillion, three hundred eighty-one billion, five hundred sixty-five million, seven hundred sixty-four thousand, five hundred twenty-five".