71275252505 has 16 divisors (see below), whose sum is σ = 87154710480. Its totient is φ = 55937526528.

The previous prime is 71275252481. The next prime is 71275252519. The reversal of 71275252505 is 50525257217.

It can be written as a sum of positive squares in 8 ways, for example, as 13520108176 + 57755144329 = 116276^2 + 240323^2 .

It is a cyclic number.

It is not a de Polignac number, because 71275252505 - 2⁶ = 71275252441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4292399 + ... + 4308971.

It is an arithmetic number, because the mean of its divisors is an integer number (5447169405).

Almost surely, 2^71275252505 is an apocalyptic number.

It is an amenable number.

71275252505 is a deficient number, since it is larger than the sum of its proper divisors (15879457975).

71275252505 is a wasteful number, since it uses less digits than its factorization.

71275252505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32860.

The product of its (nonzero) digits is 245000, while the sum is 41.

The spelling of 71275252505 in words is "seventy-one billion, two hundred seventy-five million, two hundred fifty-two thousand, five hundred five".