742578432457 has 2 divisors, whose sum is σ = 742578432458. Its totient is φ = 742578432456.

The previous prime is 742578432371. The next prime is 742578432503. The reversal of 742578432457 is 754234875247.

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., 716907663616 + 25670768841 = 846704^2 + 160221^2 .

It is a cyclic number.

It is not a de Polignac number, because 742578432457 - 2¹¹ = 742578430409 is a prime.

It is a super-2 number, since 2×742578432457² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (742578435457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371289216228 + 371289216229.

It is an arithmetic number, because the mean of its divisors is an integer number (371289216229).

Almost surely, 2^742578432457 is an apocalyptic number.

It is an amenable number.

742578432457 is a deficient number, since it is larger than the sum of its proper divisors (1).

742578432457 is an equidigital number, since it uses as much as digits as its factorization.

742578432457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52684800, while the sum is 58.

The spelling of 742578432457 in words is "seven hundred forty-two billion, five hundred seventy-eight million, four hundred thirty-two thousand, four hundred fifty-seven".