47481415736981 has 2 divisors, whose sum is σ = 47481415736982. Its totient is φ = 47481415736980.

The previous prime is 47481415736959. The next prime is 47481415737013. The reversal of 47481415736981 is 18963751418474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38920554185956 + 8560861551025 = 6238634^2 + 2925895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47481415736981 is a prime.

It is a super-2 number, since 2×47481415736981² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47481415336981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23740707868490 + 23740707868491.

It is an arithmetic number, because the mean of its divisors is an integer number (23740707868491).

Almost surely, 2^{47481415736981} is an apocalyptic number.

It is an amenable number.

47481415736981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47481415736981 is an equidigital number, since it uses as much as digits as its factorization.

47481415736981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162570240, while the sum is 68.

The spelling of 47481415736981 in words is "forty-seven trillion, four hundred eighty-one billion, four hundred fifteen million, seven hundred thirty-six thousand, nine hundred eighty-one".