2145489436091 has 2 divisors, whose sum is σ = 2145489436092. Its totient is φ = 2145489436090.

The previous prime is 2145489436049. The next prime is 2145489436147. The reversal of 2145489436091 is 1906349845412.

It is an a-pointer prime, because the next prime (2145489436147) can be obtained adding 2145489436091 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145489436091 - 2²⁶ = 2145422327227 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145489438091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072744718045 + 1072744718046.

It is an arithmetic number, because the mean of its divisors is an integer number (1072744718046).

Almost surely, 2^{2145489436091} is an apocalyptic number.

2145489436091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145489436091 is an equidigital number, since it uses as much as digits as its factorization.

2145489436091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 2145489436091 in words is "two trillion, one hundred forty-five billion, four hundred eighty-nine million, four hundred thirty-six thousand, ninety-one".