4251978737 has 2 divisors, whose sum is σ = 4251978738. Its totient is φ = 4251978736.

The previous prime is 4251978721. The next prime is 4251978769. The reversal of 4251978737 is 7378791524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3861876736 + 390102001 = 62144^2 + 19751^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251978737 - 2⁴ = 4251978721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4251978037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2125989368 + 2125989369.

It is an arithmetic number, because the mean of its divisors is an integer number (2125989369).

Almost surely, 2^4251978737 is an apocalyptic number.

It is an amenable number.

4251978737 is a deficient number, since it is larger than the sum of its proper divisors (1).

4251978737 is an equidigital number, since it uses as much as digits as its factorization.

4251978737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 53.

The square root of 4251978737 is about 65207.1985059932. The cubic root of 4251978737 is about 1620.0572475070.

The spelling of 4251978737 in words is "four billion, two hundred fifty-one million, nine hundred seventy-eight thousand, seven hundred thirty-seven".