15625473938 has 8 divisors (see below), whose sum is σ = 23439196800. Its totient is φ = 7812408340.

The previous prime is 15625473931. The next prime is 15625473967. The reversal of 15625473938 is 83937452651.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 15625473938.

It is not an unprimeable number, because it can be changed into a prime (15625473931) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 99818 + ... + 203013.

It is an arithmetic number, because the mean of its divisors is an integer number (2929899600).

Almost surely, 2^15625473938 is an apocalyptic number.

15625473938 is a deficient number, since it is larger than the sum of its proper divisors (7813722862).

15625473938 is a wasteful number, since it uses less digits than its factorization.

15625473938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328632.

The product of its digits is 5443200, while the sum is 53.

The spelling of 15625473938 in words is "fifteen billion, six hundred twenty-five million, four hundred seventy-three thousand, nine hundred thirty-eight".