245220431245091 has 2 divisors, whose sum is σ = 245220431245092. Its totient is φ = 245220431245090.

The previous prime is 245220431245073. The next prime is 245220431245183. The reversal of 245220431245091 is 190542134022542.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245220431245091 is a prime.

It is not a weakly prime, because it can be changed into another prime (245220431245021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122610215622545 + 122610215622546.

It is an arithmetic number, because the mean of its divisors is an integer number (122610215622546).

Almost surely, 2^{245220431245091} is an apocalyptic number.

245220431245091 is a deficient number, since it is larger than the sum of its proper divisors (1).

245220431245091 is an equidigital number, since it uses as much as digits as its factorization.

245220431245091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 245220431245091 in words is "two hundred forty-five trillion, two hundred twenty billion, four hundred thirty-one million, two hundred forty-five thousand, ninety-one".