72554720061 has 4 divisors (see below), whose sum is σ = 96739626752. Its totient is φ = 48369813372.

The previous prime is 72554720057. The next prime is 72554720111. The reversal of 72554720061 is 16002745527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72554720061 - 2² = 72554720057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72554727061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12092453341 + ... + 12092453346.

It is an arithmetic number, because the mean of its divisors is an integer number (24184906688).

Almost surely, 2^72554720061 is an apocalyptic number.

It is an amenable number.

72554720061 is a deficient number, since it is larger than the sum of its proper divisors (24184906691).

72554720061 is a wasteful number, since it uses less digits than its factorization.

72554720061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24184906690.

The product of its (nonzero) digits is 117600, while the sum is 39.

The spelling of 72554720061 in words is "seventy-two billion, five hundred fifty-four million, seven hundred twenty thousand, sixty-one".