47886156781 has 2 divisors, whose sum is σ = 47886156782. Its totient is φ = 47886156780.

The previous prime is 47886156749. The next prime is 47886156839. The reversal of 47886156781 is 18765168874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44028628900 + 3857527881 = 209830^2 + 62109^2 .

It is a cyclic number.

It is not a de Polignac number, because 47886156781 - 2⁵ = 47886156749 is a prime.

It is a super-2 number, since 2×47886156781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47886156181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23943078390 + 23943078391.

It is an arithmetic number, because the mean of its divisors is an integer number (23943078391).

Almost surely, 2^47886156781 is an apocalyptic number.

It is an amenable number.

47886156781 is a deficient number, since it is larger than the sum of its proper divisors (1).

47886156781 is an equidigital number, since it uses as much as digits as its factorization.

47886156781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 61.

The spelling of 47886156781 in words is "forty-seven billion, eight hundred eighty-six million, one hundred fifty-six thousand, seven hundred eighty-one".