245573434321 has 2 divisors, whose sum is σ = 245573434322. Its totient is φ = 245573434320.

The previous prime is 245573434277. The next prime is 245573434373. The reversal of 245573434321 is 123434375542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186541929025 + 59031505296 = 431905^2 + 242964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245573434321 is a prime.

It is not a weakly prime, because it can be changed into another prime (245573434921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122786717160 + 122786717161.

It is an arithmetic number, because the mean of its divisors is an integer number (122786717161).

Almost surely, 2^245573434321 is an apocalyptic number.

It is an amenable number.

245573434321 is a deficient number, since it is larger than the sum of its proper divisors (1).

245573434321 is an equidigital number, since it uses as much as digits as its factorization.

245573434321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 43.

The spelling of 245573434321 in words is "two hundred forty-five billion, five hundred seventy-three million, four hundred thirty-four thousand, three hundred twenty-one".