9921572562052 has 12 divisors (see below), whose sum is σ = 17366379080400. Its totient is φ = 4959749967656.

The previous prime is 9921572562029. The next prime is 9921572562061. The reversal of 9921572562052 is 2502652751299.

It is a junction number, because it is equal to n+sod(n) for n = 9921572561984 and 9921572562002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259056802 + ... + 259095097.

It is an arithmetic number, because the mean of its divisors is an integer number (1447198256700).

Almost surely, 2^{9921572562052} is an apocalyptic number.

It is an amenable number.

9921572562052 is a deficient number, since it is larger than the sum of its proper divisors (7444806518348).

9921572562052 is a wasteful number, since it uses less digits than its factorization.

9921572562052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518156690 (or 518156688 counting only the distinct ones).

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

The spelling of 9921572562052 in words is "nine trillion, nine hundred twenty-one billion, five hundred seventy-two million, five hundred sixty-two thousand, fifty-two".