925721636 has 12 divisors (see below), whose sum is σ = 1851443328. Its totient is φ = 396737832.

The previous prime is 925721633. The next prime is 925721681. The reversal of 925721636 is 636127529.

925721636 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 925721593 and 925721602.

It is not an unprimeable number, because it can be changed into a prime (925721633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16530716 + ... + 16530771.

It is an arithmetic number, because the mean of its divisors is an integer number (154286944).

Almost surely, 2^925721636 is an apocalyptic number.

It is an amenable number.

925721636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

925721636 is a wasteful number, since it uses less digits than its factorization.

925721636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33061498 (or 33061496 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 925721636 is about 30425.6739613110. The cubic root of 925721636 is about 974.6008924478.

The spelling of 925721636 in words is "nine hundred twenty-five million, seven hundred twenty-one thousand, six hundred thirty-six".