9940242424225 has 27 divisors (see below), whose sum is σ = 12357157806777. Its totient is φ = 7932078979680.

The previous prime is 9940242424219. The next prime is 9940242424241. The reversal of 9940242424225 is 5224242420499.

The square root of 9940242424225 is 3152815.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 541014678369 + 9399227745856 = 735537^2 + 3065816^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9940242424225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11334369487 + ... + 11334370363.

Almost surely, 2^{9940242424225} is an apocalyptic number.

9940242424225 is the 3152815-th square number.

9940242424225 is the 1576408-th centered octagonal number.

It is an amenable number.

9940242424225 is a deficient number, since it is larger than the sum of its proper divisors (2416915382552).

9940242424225 is an frugal number, since it uses more digits than its factorization.

9940242424225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 49.

Multiplying 9940242424225 by its sum of digits (49), we get a square (487071878787025 = 22069705²).

The spelling of 9940242424225 in words is "nine trillion, nine hundred forty billion, two hundred forty-two million, four hundred twenty-four thousand, two hundred twenty-five".