145891610993 has 2 divisors, whose sum is σ = 145891610994. Its totient is φ = 145891610992.

The previous prime is 145891610989. The next prime is 145891611011. The reversal of 145891610993 is 399016198541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89650539889 + 56241071104 = 299417^2 + 237152^2 .

It is a cyclic number.

It is not a de Polignac number, because 145891610993 - 2² = 145891610989 is a prime.

It is not a weakly prime, because it can be changed into another prime (145891615993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72945805496 + 72945805497.

It is an arithmetic number, because the mean of its divisors is an integer number (72945805497).

Almost surely, 2^145891610993 is an apocalyptic number.

It is an amenable number.

145891610993 is a deficient number, since it is larger than the sum of its proper divisors (1).

145891610993 is an equidigital number, since it uses as much as digits as its factorization.

145891610993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 56.

The spelling of 145891610993 in words is "one hundred forty-five billion, eight hundred ninety-one million, six hundred ten thousand, nine hundred ninety-three".