75435240012557 has 2 divisors, whose sum is σ = 75435240012558. Its totient is φ = 75435240012556.

The previous prime is 75435240012553. The next prime is 75435240012569. The reversal of 75435240012557 is 75521004253457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62365467746761 + 13069772265796 = 7897181^2 + 3615214^2 .

It is a cyclic number.

It is not a de Polignac number, because 75435240012557 - 2² = 75435240012553 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75435240012553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37717620006278 + 37717620006279.

It is an arithmetic number, because the mean of its divisors is an integer number (37717620006279).

Almost surely, 2^{75435240012557} is an apocalyptic number.

It is an amenable number.

75435240012557 is a deficient number, since it is larger than the sum of its proper divisors (1).

75435240012557 is an equidigital number, since it uses as much as digits as its factorization.

75435240012557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880000, while the sum is 50.

The spelling of 75435240012557 in words is "seventy-five trillion, four hundred thirty-five billion, two hundred forty million, twelve thousand, five hundred fifty-seven".