71307123653 has 4 divisors (see below), whose sum is σ = 71345075040. Its totient is φ = 71269172268.

The previous prime is 71307123623. The next prime is 71307123659. The reversal of 71307123653 is 35632170317.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35632170317 = 197 ⋅180873961.

It is a cyclic number.

It is not a de Polignac number, because 71307123653 - 2²⁴ = 71290346437 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 (71307123659) 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, 18972875 + ... + 18976632.

It is an arithmetic number, because the mean of its divisors is an integer number (17836268760).

Almost surely, 2^71307123653 is an apocalyptic number.

It is an amenable number.

71307123653 is a deficient number, since it is larger than the sum of its proper divisors (37951387).

71307123653 is a wasteful number, since it uses less digits than its factorization.

71307123653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37951386.

The product of its (nonzero) digits is 79380, while the sum is 38.

The spelling of 71307123653 in words is "seventy-one billion, three hundred seven million, one hundred twenty-three thousand, six hundred fifty-three".