71861500004 has 24 divisors (see below), whose sum is σ = 143871069888. Its totient is φ = 30766056480.

The previous prime is 71861499977. The next prime is 71861500019. The reversal of 71861500004 is 40000516817.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294379 + ... + 1348754.

It is an arithmetic number, because the mean of its divisors is an integer number (5994627912).

Almost surely, 2^71861500004 is an apocalyptic number.

It is an amenable number.

71861500004 is an abundant number, since it is smaller than the sum of its proper divisors (72009569884).

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

71861500004 is a wasteful number, since it uses less digits than its factorization.

71861500004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644115 (or 2644113 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 71861500004 in words is "seventy-one billion, eight hundred sixty-one million, five hundred thousand, four".