825649755931 has 48 divisors (see below), whose sum is σ = 1167269775840. Its totient is φ = 573395397120.

The previous prime is 825649755919. The next prime is 825649755949. The reversal of 825649755931 is 139557946528.

It is not a de Polignac number, because 825649755931 - 2⁵ = 825649755899 is a prime.

It is a super-2 number, since 2×825649755931² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (825649755911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1828386 + ... + 2234791.

It is an arithmetic number, because the mean of its divisors is an integer number (24318120330).

Almost surely, 2^825649755931 is an apocalyptic number.

825649755931 is a deficient number, since it is larger than the sum of its proper divisors (341620019909).

825649755931 is a wasteful number, since it uses less digits than its factorization.

825649755931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063244 (or 4063237 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 64.

The spelling of 825649755931 in words is "eight hundred twenty-five billion, six hundred forty-nine million, seven hundred fifty-five thousand, nine hundred thirty-one".