72701565653 has 4 divisors (see below), whose sum is σ = 72702367788. Its totient is φ = 72700763520.

The previous prime is 72701565647. The next prime is 72701565661. The reversal of 72701565653 is 35656510727.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 35656510727 = 3967 ⋅8988281.

It can be written as a sum of positive squares in 2 ways, for example, as 31485663364 + 41215902289 = 177442^2 + 203017^2 .

It is a cyclic number.

It is not a de Polignac number, because 72701565653 - 2⁴ = 72701565637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72701565598 and 72701565607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72701565683) 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, 244826 + ... + 453147.

It is an arithmetic number, because the mean of its divisors is an integer number (18175591947).

Almost surely, 2^72701565653 is an apocalyptic number.

It is an amenable number.

72701565653 is a deficient number, since it is larger than the sum of its proper divisors (802135).

72701565653 is a wasteful number, since it uses less digits than its factorization.

72701565653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802134.

The product of its (nonzero) digits is 1323000, while the sum is 47.

The spelling of 72701565653 in words is "seventy-two billion, seven hundred one million, five hundred sixty-five thousand, six hundred fifty-three".