71235318953 has 4 divisors (see below), whose sum is σ = 71235901440. Its totient is φ = 71234736468.

The previous prime is 71235318937. The next prime is 71235319037. The reversal of 71235318953 is 35981353217.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 35981353217 = 35977 ⋅1000121.

It is a cyclic number.

It is not a de Polignac number, because 71235318953 - 2⁴ = 71235318937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71235318898 and 71235318907.

It is not an unprimeable number, because it can be changed into a prime (71235315953) 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, 29225 + ... + 378582.

It is an arithmetic number, because the mean of its divisors is an integer number (17808975360).

Almost surely, 2^71235318953 is an apocalyptic number.

It is an amenable number.

71235318953 is a deficient number, since it is larger than the sum of its proper divisors (582487).

71235318953 is a wasteful number, since it uses less digits than its factorization.

71235318953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582486.

The product of its digits is 680400, while the sum is 47.

The spelling of 71235318953 in words is "seventy-one billion, two hundred thirty-five million, three hundred eighteen thousand, nine hundred fifty-three".