15222920636 has 192 divisors, whose sum is σ = 35517726720. Its totient is φ = 5537376000.

The previous prime is 15222920617. The next prime is 15222920639. The reversal of 15222920636 is 63602922251.

It is a self number, because there is not a number n which added to its sum of digits gives 15222920636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15222920639) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34363031 + ... + 34363473.

It is an arithmetic number, because the mean of its divisors is an integer number (184988160).

Almost surely, 2^15222920636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15222920636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17758863360).

15222920636 is an abundant number, since it is smaller than the sum of its proper divisors (20294806084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15222920636 is a wasteful number, since it uses less digits than its factorization.

15222920636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 15222920636 in words is "fifteen billion, two hundred twenty-two million, nine hundred twenty thousand, six hundred thirty-six".