47976364781 has 2 divisors, whose sum is σ = 47976364782. Its totient is φ = 47976364780.

The previous prime is 47976364757. The next prime is 47976364783. The reversal of 47976364781 is 18746367974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37929510025 + 10046854756 = 194755^2 + 100234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47976364781 is a prime.

It is a super-2 number, since 2×47976364781² (a number of 22 digits) contains 22 as substring.

Together with 47976364783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47976364783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23988182390 + 23988182391.

It is an arithmetic number, because the mean of its divisors is an integer number (23988182391).

Almost surely, 2^47976364781 is an apocalyptic number.

It is an amenable number.

47976364781 is a deficient number, since it is larger than the sum of its proper divisors (1).

47976364781 is an equidigital number, since it uses as much as digits as its factorization.

47976364781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42674688, while the sum is 62.

The spelling of 47976364781 in words is "forty-seven billion, nine hundred seventy-six million, three hundred sixty-four thousand, seven hundred eighty-one".