9919725623242 has 16 divisors (see below), whose sum is σ = 14889789160200. Its totient is φ = 4956462950400.

The previous prime is 9919725623237. The next prime is 9919725623243. The reversal of 9919725623242 is 2423265279199.

It can be written as a sum of positive squares in 4 ways, for example, as 9895560609841 + 24165013401 = 3145721^2 + 155451^2 .

It is not an unprimeable number, because it can be changed into a prime (9919725623243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58091884 + ... + 58262392.

Almost surely, 2^{9919725623242} is an apocalyptic number.

9919725623242 is a deficient number, since it is larger than the sum of its proper divisors (4970063536958).

9919725623242 is a wasteful number, since it uses less digits than its factorization.

9919725623242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190281.

The product of its digits is 29393280, while the sum is 61.

The spelling of 9919725623242 in words is "nine trillion, nine hundred nineteen billion, seven hundred twenty-five million, six hundred twenty-three thousand, two hundred forty-two".