72561172552705 has 8 divisors (see below), whose sum is σ = 87738089560704. Its totient is φ = 57605816377200.

The previous prime is 72561172552703. The next prime is 72561172552751. The reversal of 72561172552705 is 50725527116527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72561172552705 - 2¹ = 72561172552703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72561172552703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55390207401 + ... + 55390208710.

It is an arithmetic number, because the mean of its divisors is an integer number (10967261195088).

Almost surely, 2^{72561172552705} is an apocalyptic number.

It is an amenable number.

72561172552705 is a deficient number, since it is larger than the sum of its proper divisors (15176917007999).

72561172552705 is a wasteful number, since it uses less digits than its factorization.

72561172552705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110780416247.

The product of its (nonzero) digits is 10290000, while the sum is 55.

The spelling of 72561172552705 in words is "seventy-two trillion, five hundred sixty-one billion, one hundred seventy-two million, five hundred fifty-two thousand, seven hundred five".