9725697751472 has 20 divisors (see below), whose sum is σ = 18844527954120. Its totient is φ = 4862593763328.

The previous prime is 9725697751459. The next prime is 9725697751493. The reversal of 9725697751472 is 2741577965279.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 9725697751396 and 9725697751405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15629822 + ... + 16240157.

It is an arithmetic number, because the mean of its divisors is an integer number (942226397706).

Almost surely, 2^{9725697751472} is an apocalyptic number.

It is an amenable number.

9725697751472 is a deficient number, since it is larger than the sum of its proper divisors (9118830202648).

9725697751472 is a wasteful number, since it uses less digits than its factorization.

9725697751472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31889060 (or 31889054 counting only the distinct ones).

The product of its digits is 466754400, while the sum is 71.

The spelling of 9725697751472 in words is "nine trillion, seven hundred twenty-five billion, six hundred ninety-seven million, seven hundred fifty-one thousand, four hundred seventy-two".