15225220464 has 80 divisors (see below), whose sum is σ = 40734059520. Its totient is φ = 4895216640.

The previous prime is 15225220463. The next prime is 15225220511. The reversal of 15225220464 is 46402252251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15225220463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440152 + ... + 473480.

It is an arithmetic number, because the mean of its divisors is an integer number (509175744).

Almost surely, 2^15225220464 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 15225220464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20367029760).

15225220464 is an abundant number, since it is smaller than the sum of its proper divisors (25508839056).

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

15225220464 is a wasteful number, since it uses less digits than its factorization.

15225220464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33678 (or 33672 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 15225220464 in words is "fifteen billion, two hundred twenty-five million, two hundred twenty thousand, four hundred sixty-four".