63090064781 has 2 divisors, whose sum is σ = 63090064782. Its totient is φ = 63090064780.

The previous prime is 63090064727. The next prime is 63090064789. The reversal of 63090064781 is 18746009036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54704999881 + 8385064900 = 233891^2 + 91570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63090064781 is a prime.

It is a super-2 number, since 2×63090064781² (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 (63090064789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31545032390 + 31545032391.

It is an arithmetic number, because the mean of its divisors is an integer number (31545032391).

Almost surely, 2^63090064781 is an apocalyptic number.

It is an amenable number.

63090064781 is a deficient number, since it is larger than the sum of its proper divisors (1).

63090064781 is an equidigital number, since it uses as much as digits as its factorization.

63090064781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 63090064781 in words is "sixty-three billion, ninety million, sixty-four thousand, seven hundred eighty-one".