47511356909 has 2 divisors, whose sum is σ = 47511356910. Its totient is φ = 47511356908.

The previous prime is 47511356831. The next prime is 47511356929. The reversal of 47511356909 is 90965311574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43582825225 + 3928531684 = 208765^2 + 62678^2 .

It is a cyclic number.

It is not a de Polignac number, because 47511356909 - 2²⁰ = 47510308333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47511356929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23755678454 + 23755678455.

It is an arithmetic number, because the mean of its divisors is an integer number (23755678455).

Almost surely, 2^47511356909 is an apocalyptic number.

It is an amenable number.

47511356909 is a deficient number, since it is larger than the sum of its proper divisors (1).

47511356909 is an equidigital number, since it uses as much as digits as its factorization.

47511356909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The spelling of 47511356909 in words is "forty-seven billion, five hundred eleven million, three hundred fifty-six thousand, nine hundred nine".