9072021504 has 624 divisors, whose sum is σ = 32420633280. Its totient is φ = 2229534720.

The previous prime is 9072021499. The next prime is 9072021509. The reversal of 9072021504 is 4051202709.

It is an interprime number because it is at equal distance from previous prime (9072021499) and next prime (9072021509).

It is a tau number, because it is divible by the number of its divisors (624).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9072021509) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148721634 + ... + 148721694.

Almost surely, 2^9072021504 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 9072021504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16210316640).

9072021504 is an abundant number, since it is smaller than the sum of its proper divisors (23348611776).

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

9072021504 is a wasteful number, since it uses less digits than its factorization.

9072021504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 9072021504 is about 95247.1600836476. The cubic root of 9072021504 is about 2085.6176348247.

The spelling of 9072021504 in words is "nine billion, seventy-two million, twenty-one thousand, five hundred four".