71647891201 has 4 divisors (see below), whose sum is σ = 71648428032. Its totient is φ = 71647354372.

The previous prime is 71647891193. The next prime is 71647891213. The reversal of 71647891201 is 10219874617.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 71647891201 - 2³ = 71647891193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71647801201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104256 + ... + 392638.

It is an arithmetic number, because the mean of its divisors is an integer number (17912107008).

Almost surely, 2^71647891201 is an apocalyptic number.

It is an amenable number.

71647891201 is a deficient number, since it is larger than the sum of its proper divisors (536831).

71647891201 is a wasteful number, since it uses less digits than its factorization.

71647891201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536830.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 71647891201 in words is "seventy-one billion, six hundred forty-seven million, eight hundred ninety-one thousand, two hundred one".