825744135780 has 96 divisors (see below), whose sum is σ = 2607324881280. Its totient is φ = 216911882880.

The previous prime is 825744135773. The next prime is 825744135791. The reversal of 825744135780 is 87531447528.

825744135780 is a `hidden beast` number, since 8 + 2 + 57 + 4 + 4 + 13 + 578 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11375431 + ... + 11447790.

It is an arithmetic number, because the mean of its divisors is an integer number (27159634180).

Almost surely, 2^825744135780 is an apocalyptic number.

It is an amenable number.

825744135780 is an abundant number, since it is smaller than the sum of its proper divisors (1781580745500).

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

825744135780 is a wasteful number, since it uses less digits than its factorization.

825744135780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22823306 (or 22823298 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 825744135780 in words is "eight hundred twenty-five billion, seven hundred forty-four million, one hundred thirty-five thousand, seven hundred eighty".