71209515996 has 36 divisors (see below), whose sum is σ = 180402768000. Its totient is φ = 23683634688.

The previous prime is 71209515973. The next prime is 71209516043. The reversal of 71209515996 is 69951590217.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2186556 + ... + 2218883.

It is an arithmetic number, because the mean of its divisors is an integer number (5011188000).

Almost surely, 2^71209515996 is an apocalyptic number.

It is an amenable number.

71209515996 is an abundant number, since it is smaller than the sum of its proper divisors (109193252004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71209515996 is a wasteful number, since it uses less digits than its factorization.

71209515996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4405898 (or 4405893 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 54.

The spelling of 71209515996 in words is "seventy-one billion, two hundred nine million, five hundred fifteen thousand, nine hundred ninety-six".