825587541780 has 24 divisors (see below), whose sum is σ = 2311645117152. Its totient is φ = 220156677792.

The previous prime is 825587541763. The next prime is 825587541811. The reversal of 825587541780 is 87145785528.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 13759792363 = 825587541780 / (8 + 2 + 5 + 5 + 8 + 7 + 5 + 4 + 1 + 7 + 8 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6879896122 + ... + 6879896241.

It is an arithmetic number, because the mean of its divisors is an integer number (96318546548).

Almost surely, 2^825587541780 is an apocalyptic number.

It is an amenable number.

825587541780 is an abundant number, since it is smaller than the sum of its proper divisors (1486057575372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825587541780 is a wasteful number, since it uses less digits than its factorization.

825587541780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13759792375 (or 13759792373 counting only the distinct ones).

The product of its (nonzero) digits is 25088000, while the sum is 60.

The spelling of 825587541780 in words is "eight hundred twenty-five billion, five hundred eighty-seven million, five hundred forty-one thousand, seven hundred eighty".