72530755673730 has 32 divisors (see below), whose sum is σ = 174077490944448. Its totient is φ = 19341126254400.

The previous prime is 72530755673711. The next prime is 72530755673731. The reversal of 72530755673730 is 3737655703527.

It is a happy number.

72530755673730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×72530755673730³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (72530755673731) 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, 24091876 + ... + 26934735.

It is an arithmetic number, because the mean of its divisors is an integer number (5439921592014).

Almost surely, 2^{72530755673730} is an apocalyptic number.

72530755673730 is an abundant number, since it is smaller than the sum of its proper divisors (101546735270718).

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

72530755673730 is a wasteful number, since it uses less digits than its factorization.

72530755673730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51074002.

The product of its (nonzero) digits is 97240500, while the sum is 60.

The spelling of 72530755673730 in words is "seventy-two trillion, five hundred thirty billion, seven hundred fifty-five million, six hundred seventy-three thousand, seven hundred thirty".