9925653896887 has 4 divisors (see below), whose sum is σ = 9926474143176. Its totient is φ = 9924833650600.

The previous prime is 9925653896881. The next prime is 9925653896903. The reversal of 9925653896887 is 7886983565299.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9925653896887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9925653896881) 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, 410104993 + ... + 410129194.

It is an arithmetic number, because the mean of its divisors is an integer number (2481618535794).

Almost surely, 2^{9925653896887} is an apocalyptic number.

9925653896887 is a deficient number, since it is larger than the sum of its proper divisors (820246289).

9925653896887 is a wasteful number, since it uses less digits than its factorization.

9925653896887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820246288.

The product of its digits is 14108774400, while the sum is 85.

The spelling of 9925653896887 in words is "nine trillion, nine hundred twenty-five billion, six hundred fifty-three million, eight hundred ninety-six thousand, eight hundred eighty-seven".