73225578720 has 384 divisors, whose sum is σ = 267624677376. Its totient is φ = 16484622336.

The previous prime is 73225578707. The next prime is 73225578757. The reversal of 73225578720 is 2787552237.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 73225578720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66994494 + ... + 66995586.

It is an arithmetic number, because the mean of its divisors is an integer number (696939264).

Almost surely, 2^73225578720 is an apocalyptic number.

73225578720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73225578720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133812338688).

73225578720 is an abundant number, since it is smaller than the sum of its proper divisors (194399098656).

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

73225578720 is a wasteful number, since it uses less digits than its factorization.

73225578720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 48.

The spelling of 73225578720 in words is "seventy-three billion, two hundred twenty-five million, five hundred seventy-eight thousand, seven hundred twenty".