15722342638 has 4 divisors (see below), whose sum is σ = 23583513960. Its totient is φ = 7861171318.

The previous prime is 15722342621. The next prime is 15722342641. The reversal of 15722342638 is 83624322751.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 15722342594 and 15722342603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3930585658 + ... + 3930585661.

It is an arithmetic number, because the mean of its divisors is an integer number (5895878490).

Almost surely, 2^15722342638 is an apocalyptic number.

15722342638 is a deficient number, since it is larger than the sum of its proper divisors (7861171322).

15722342638 is an equidigital number, since it uses as much as digits as its factorization.

15722342638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7861171321.

The product of its digits is 483840, while the sum is 43.

The spelling of 15722342638 in words is "fifteen billion, seven hundred twenty-two million, three hundred forty-two thousand, six hundred thirty-eight".