754478928875521 has 2 divisors, whose sum is σ = 754478928875522. Its totient is φ = 754478928875520.

The previous prime is 754478928875467. The next prime is 754478928875533. The reversal of 754478928875521 is 125578829874457.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678518361108225 + 75960567767296 = 26048385^2 + 8715536^2 .

It is a cyclic number.

It is not a de Polignac number, because 754478928875521 - 2⁷ = 754478928875393 is a prime.

It is not a weakly prime, because it can be changed into another prime (754478928875561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377239464437760 + 377239464437761.

It is an arithmetic number, because the mean of its divisors is an integer number (377239464437761).

Almost surely, 2^{754478928875521} is an apocalyptic number.

It is an amenable number.

754478928875521 is a deficient number, since it is larger than the sum of its proper divisors (1).

754478928875521 is an equidigital number, since it uses as much as digits as its factorization.

754478928875521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12644352000, while the sum is 82.

The spelling of 754478928875521 in words is "seven hundred fifty-four trillion, four hundred seventy-eight billion, nine hundred twenty-eight million, eight hundred seventy-five thousand, five hundred twenty-one".