2145340501161 has 32 divisors (see below), whose sum is σ = 3393806048640. Its totient is φ = 1188307392000.

The previous prime is 2145340501147. The next prime is 2145340501181. The reversal of 2145340501161 is 1611050435412.

It is a de Polignac number, because none of the positive numbers 2^k-2145340501161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2145340501181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24713076 + ... + 24799733.

It is an arithmetic number, because the mean of its divisors is an integer number (106056439020).

Almost surely, 2^{2145340501161} is an apocalyptic number.

It is an amenable number.

2145340501161 is a deficient number, since it is larger than the sum of its proper divisors (1248465547479).

2145340501161 is a wasteful number, since it uses less digits than its factorization.

2145340501161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49512937.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 2145340501161 its reverse (1611050435412), we get a palindrome (3756390936573).

The spelling of 2145340501161 in words is "two trillion, one hundred forty-five billion, three hundred forty million, five hundred one thousand, one hundred sixty-one".