47642221751 has 4 divisors (see below), whose sum is σ = 47655375312. Its totient is φ = 47629068192.

The previous prime is 47642221729. The next prime is 47642221777. The reversal of 47642221751 is 15712224674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15712224674 = 2 ⋅7856112337.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47642221751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47642221699 and 47642221708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47642221051) 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, 6571346 + ... + 6578591.

It is an arithmetic number, because the mean of its divisors is an integer number (11913843828).

Almost surely, 2^47642221751 is an apocalyptic number.

47642221751 is a deficient number, since it is larger than the sum of its proper divisors (13153561).

47642221751 is a wasteful number, since it uses less digits than its factorization.

47642221751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13153560.

The product of its digits is 188160, while the sum is 41.

The spelling of 47642221751 in words is "forty-seven billion, six hundred forty-two million, two hundred twenty-one thousand, seven hundred fifty-one".