47621516640689 has 2 divisors, whose sum is σ = 47621516640690. Its totient is φ = 47621516640688.

The previous prime is 47621516640671. The next prime is 47621516640757. The reversal of 47621516640689 is 98604661512674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44196130032289 + 3425386608400 = 6648017^2 + 1850780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47621516640689 is a prime.

It is not a weakly prime, because it can be changed into another prime (47621516640289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23810758320344 + 23810758320345.

It is an arithmetic number, because the mean of its divisors is an integer number (23810758320345).

Almost surely, 2^{47621516640689} is an apocalyptic number.

It is an amenable number.

47621516640689 is a deficient number, since it is larger than the sum of its proper divisors (1).

47621516640689 is an equidigital number, since it uses as much as digits as its factorization.

47621516640689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104509440, while the sum is 65.

The spelling of 47621516640689 in words is "forty-seven trillion, six hundred twenty-one billion, five hundred sixteen million, six hundred forty thousand, six hundred eighty-nine".