9963555025972 has 36 divisors (see below), whose sum is σ = 18522690499180. Its totient is φ = 4688611236864.

The previous prime is 9963555025913. The next prime is 9963555026017. The reversal of 9963555025972 is 2795205553699.

It can be written as a sum of positive squares in 6 ways, for example, as 666580805136 + 9296974220836 = 816444^2 + 3049094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9963555025898 and 9963555025907.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 58094698 + ... + 58265950.

Almost surely, 2^{9963555025972} is an apocalyptic number.

It is an amenable number.

9963555025972 is a deficient number, since it is larger than the sum of its proper divisors (8559135473208).

9963555025972 is a wasteful number, since it uses less digits than its factorization.

9963555025972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221620 (or 221601 counting only the distinct ones).

The product of its (nonzero) digits is 229635000, while the sum is 67.

The spelling of 9963555025972 in words is "nine trillion, nine hundred sixty-three billion, five hundred fifty-five million, twenty-five thousand, nine hundred seventy-two".