71630020257 has 8 divisors (see below), whose sum is σ = 95593759776. Its totient is φ = 47709813792.

The previous prime is 71630020199. The next prime is 71630020277. The reversal of 71630020257 is 75202003617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71630020257 - 2⁸ = 71630020001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71630020277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10879423 + ... + 10886004.

It is an arithmetic number, because the mean of its divisors is an integer number (11949219972).

Almost surely, 2^71630020257 is an apocalyptic number.

It is an amenable number.

71630020257 is a deficient number, since it is larger than the sum of its proper divisors (23963739519).

71630020257 is a wasteful number, since it uses less digits than its factorization.

71630020257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21766527.

The product of its (nonzero) digits is 17640, while the sum is 33.

The spelling of 71630020257 in words is "seventy-one billion, six hundred thirty million, twenty thousand, two hundred fifty-seven".