72501161653 has 8 divisors (see below), whose sum is σ = 75013921080. Its totient is φ = 69989250240.

The previous prime is 72501161633. The next prime is 72501161657. The reversal of 72501161653 is 35616110527.

It can be written as a sum of positive squares in 4 ways, for example, as 613899729 + 71887261924 = 24777^2 + 268118^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72501161653 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 (72501161657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35550 + ... + 382447.

It is an arithmetic number, because the mean of its divisors is an integer number (9376740135).

Almost surely, 2^72501161653 is an apocalyptic number.

It is an amenable number.

72501161653 is a deficient number, since it is larger than the sum of its proper divisors (2512759427).

72501161653 is a wasteful number, since it uses less digits than its factorization.

72501161653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424007.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 72501161653 in words is "seventy-two billion, five hundred one million, one hundred sixty-one thousand, six hundred fifty-three".