73403753280 has 896 divisors, whose sum is σ = 294653915136. Its totient is φ = 15207628800.

The previous prime is 73403753233. The next prime is 73403753287. The reversal of 73403753280 is 8235730437.

It is a super-2 number, since 2×73403753280² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73403753287) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 165696739 + ... + 165697181.

It is an arithmetic number, because the mean of its divisors is an integer number (328854816).

Almost surely, 2^73403753280 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 73403753280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147326957568).

73403753280 is an abundant number, since it is smaller than the sum of its proper divisors (221250161856).

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

73403753280 is a wasteful number, since it uses less digits than its factorization.

73403753280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 73403753280 in words is "seventy-three billion, four hundred three million, seven hundred fifty-three thousand, two hundred eighty".