2320638862781 has 2 divisors, whose sum is σ = 2320638862782. Its totient is φ = 2320638862780.

The previous prime is 2320638862769. The next prime is 2320638862807. The reversal of 2320638862781 is 1872688360232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2195864604025 + 124774258756 = 1481845^2 + 353234^2 .

It is a cyclic number.

It is not a de Polignac number, because 2320638862781 - 2²⁶ = 2320571753917 is a prime.

It is a super-2 number, since 2×2320638862781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2320638862081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160319431390 + 1160319431391.

It is an arithmetic number, because the mean of its divisors is an integer number (1160319431391).

Almost surely, 2^{2320638862781} is an apocalyptic number.

It is an amenable number.

2320638862781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2320638862781 is an equidigital number, since it uses as much as digits as its factorization.

2320638862781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 2320638862781 in words is "two trillion, three hundred twenty billion, six hundred thirty-eight million, eight hundred sixty-two thousand, seven hundred eighty-one".