47506437691 has 2 divisors, whose sum is σ = 47506437692. Its totient is φ = 47506437690.

The previous prime is 47506437683. The next prime is 47506437731. The reversal of 47506437691 is 19673460574.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47506437691 - 2³ = 47506437683 is a prime.

It is a super-2 number, since 2×47506437691² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47506437791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23753218845 + 23753218846.

It is an arithmetic number, because the mean of its divisors is an integer number (23753218846).

Almost surely, 2^47506437691 is an apocalyptic number.

47506437691 is a deficient number, since it is larger than the sum of its proper divisors (1).

47506437691 is an equidigital number, since it uses as much as digits as its factorization.

47506437691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 47506437691 in words is "forty-seven billion, five hundred six million, four hundred thirty-seven thousand, six hundred ninety-one".