825757507780 has 48 divisors (see below), whose sum is σ = 1794340401840. Its totient is φ = 318832640000.

The previous prime is 825757507747. The next prime is 825757507789. The reversal of 825757507780 is 87705757528.

It can be written as a sum of positive squares in 8 ways, for example, as 8836 + 825757498944 = 94^2 + 908712^2 .

It is not an unprimeable number, because it can be changed into a prime (825757507789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2142660 + ... + 2498500.

It is an arithmetic number, because the mean of its divisors is an integer number (37382091705).

Almost surely, 2^825757507780 is an apocalyptic number.

It is an amenable number.

825757507780 is an abundant number, since it is smaller than the sum of its proper divisors (968582894060).

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

825757507780 is a wasteful number, since it uses less digits than its factorization.

825757507780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359880 (or 359878 counting only the distinct ones).

The product of its (nonzero) digits is 38416000, while the sum is 61.

The spelling of 825757507780 in words is "eight hundred twenty-five billion, seven hundred fifty-seven million, five hundred seven thousand, seven hundred eighty".