71261396015 has 4 divisors (see below), whose sum is σ = 85513675224. Its totient is φ = 57009116808.

The previous prime is 71261396009. The next prime is 71261396021. The reversal of 71261396015 is 51069316217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51069316217 = 4481 ⋅11396857.

It is an interprime number because it is at equal distance from previous prime (71261396009) and next prime (71261396021).

It is a cyclic number.

It is not a de Polignac number, because 71261396015 - 2⁶ = 71261395951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7126139597 + ... + 7126139606.

It is an arithmetic number, because the mean of its divisors is an integer number (21378418806).

Almost surely, 2^71261396015 is an apocalyptic number.

71261396015 is a deficient number, since it is larger than the sum of its proper divisors (14252279209).

71261396015 is a wasteful number, since it uses less digits than its factorization.

71261396015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14252279208.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 71261396015 in words is "seventy-one billion, two hundred sixty-one million, three hundred ninety-six thousand, fifteen".