6401740789 has 2 divisors, whose sum is σ = 6401740790. Its totient is φ = 6401740788.

The previous prime is 6401740687. The next prime is 6401740801. The reversal of 6401740789 is 9870471046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3361100625 + 3040640164 = 57975^2 + 55142^2 .

It is a cyclic number.

It is not a de Polignac number, because 6401740789 - 2⁹ = 6401740277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401746789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200870394 + 3200870395.

It is an arithmetic number, because the mean of its divisors is an integer number (3200870395).

Almost surely, 2^6401740789 is an apocalyptic number.

It is an amenable number.

6401740789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401740789 is an equidigital number, since it uses as much as digits as its factorization.

6401740789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 6401740789 is about 80010.8791915199. The cubic root of 6401740789 is about 1856.8038520766.

The spelling of 6401740789 in words is "six billion, four hundred one million, seven hundred forty thousand, seven hundred eighty-nine".