4378534261 has 2 divisors, whose sum is σ = 4378534262. Its totient is φ = 4378534260.

The previous prime is 4378534247. The next prime is 4378534301. The reversal of 4378534261 is 1624358734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4371722161 + 6812100 = 66119^2 + 2610^2 .

It is a cyclic number.

It is not a de Polignac number, because 4378534261 - 2¹⁷ = 4378403189 is a prime.

It is a super-2 number, since 2×4378534261² = 38343124549501632242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4378534201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2189267130 + 2189267131.

It is an arithmetic number, because the mean of its divisors is an integer number (2189267131).

Almost surely, 2^4378534261 is an apocalyptic number.

It is an amenable number.

4378534261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4378534261 is an equidigital number, since it uses as much as digits as its factorization.

4378534261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 43.

The square root of 4378534261 is about 66170.4938851147. The cubic root of 4378534261 is about 1635.9734480629.

The spelling of 4378534261 in words is "four billion, three hundred seventy-eight million, five hundred thirty-four thousand, two hundred sixty-one".