2145546617 has 2 divisors, whose sum is σ = 2145546618. Its totient is φ = 2145546616.

The previous prime is 2145546553. The next prime is 2145546647. The reversal of 2145546617 is 7166455412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2122352761 + 23193856 = 46069^2 + 4816^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145546617 - 2⁶ = 2145546553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145546647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072773308 + 1072773309.

It is an arithmetic number, because the mean of its divisors is an integer number (1072773309).

Almost surely, 2^2145546617 is an apocalyptic number.

It is an amenable number.

2145546617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145546617 is an equidigital number, since it uses as much as digits as its factorization.

2145546617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The square root of 2145546617 is about 46320.0455202712. The cubic root of 2145546617 is about 1289.7711304001.

The spelling of 2145546617 in words is "two billion, one hundred forty-five million, five hundred forty-six thousand, six hundred seventeen".