9725253985 has 16 divisors (see below), whose sum is σ = 11760420672. Its totient is φ = 7720315200.

The previous prime is 9725253983. The next prime is 9725254009. The reversal of 9725253985 is 5893525279.

It is a happy number.

It is not a de Polignac number, because 9725253985 - 2¹ = 9725253983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9725253983) 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, 411130 + ... + 434140.

It is an arithmetic number, because the mean of its divisors is an integer number (735026292).

Almost surely, 2^9725253985 is an apocalyptic number.

It is an amenable number.

9725253985 is a deficient number, since it is larger than the sum of its proper divisors (2035166687).

9725253985 is a wasteful number, since it uses less digits than its factorization.

9725253985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23664.

The product of its digits is 6804000, while the sum is 55.

The square root of 9725253985 is about 98616.7023632407. The cubic root of 9725253985 is about 2134.5204373842.

The spelling of 9725253985 in words is "nine billion, seven hundred twenty-five million, two hundred fifty-three thousand, nine hundred eighty-five".