71121263515 has 16 divisors (see below), whose sum is σ = 85599203328. Its totient is φ = 56727996256.

The previous prime is 71121263509. The next prime is 71121263557. The reversal of 71121263515 is 51536212117.

It is a cyclic number.

It is not a de Polignac number, because 71121263515 - 2¹³ = 71121255323 is a prime.

It is a Duffinian number.

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, 7507812 + ... + 7517278.

It is an arithmetic number, because the mean of its divisors is an integer number (5349950208).

Almost surely, 2^71121263515 is an apocalyptic number.

71121263515 is a deficient number, since it is larger than the sum of its proper divisors (14477939813).

71121263515 is a wasteful number, since it uses less digits than its factorization.

71121263515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13778.

The product of its digits is 12600, while the sum is 34.

The spelling of 71121263515 in words is "seventy-one billion, one hundred twenty-one million, two hundred sixty-three thousand, five hundred fifteen".