47508642721 has 4 divisors (see below), whose sum is σ = 47524361472. Its totient is φ = 47492923972.

The previous prime is 47508642707. The next prime is 47508642733. The reversal of 47508642721 is 12724680574.

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.

It is a cyclic number.

It is not a de Polignac number, because 47508642721 - 2²⁵ = 47475088289 is a prime.

It is a super-2 number, since 2×47508642721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47508642761) 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, 7854841 + ... + 7860886.

It is an arithmetic number, because the mean of its divisors is an integer number (11881090368).

Almost surely, 2^47508642721 is an apocalyptic number.

It is an amenable number.

47508642721 is a deficient number, since it is larger than the sum of its proper divisors (15718751).

47508642721 is a wasteful number, since it uses less digits than its factorization.

47508642721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15718750.

The product of its (nonzero) digits is 752640, while the sum is 46.

The spelling of 47508642721 in words is "forty-seven billion, five hundred eight million, six hundred forty-two thousand, seven hundred twenty-one".