3914778402481 has 2 divisors, whose sum is σ = 3914778402482. Its totient is φ = 3914778402480.

The previous prime is 3914778402391. The next prime is 3914778402527. The reversal of 3914778402481 is 1842048774193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3608841093025 + 305937309456 = 1899695^2 + 553116^2 .

It is a cyclic number.

It is not a de Polignac number, because 3914778402481 - 2⁴¹ = 1715755146929 is a prime.

It is a super-2 number, since 2×3914778402481² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3914778402581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957389201240 + 1957389201241.

It is an arithmetic number, because the mean of its divisors is an integer number (1957389201241).

Almost surely, 2^{3914778402481} is an apocalyptic number.

It is an amenable number.

3914778402481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3914778402481 is an equidigital number, since it uses as much as digits as its factorization.

3914778402481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 3914778402481 in words is "three trillion, nine hundred fourteen billion, seven hundred seventy-eight million, four hundred two thousand, four hundred eighty-one".