2145650205601 has 16 divisors (see below), whose sum is σ = 2486834224128. Its totient is φ = 1813134430800.

The previous prime is 2145650205581. The next prime is 2145650205619. The reversal of 2145650205601 is 1065020565412.

It is not a de Polignac number, because 2145650205601 - 2¹¹ = 2145650203553 is a prime.

It is a super-2 number, since 2×2145650205601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145650205641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10921626 + ... + 11116348.

It is an arithmetic number, because the mean of its divisors is an integer number (155427139008).

Almost surely, 2^{2145650205601} is an apocalyptic number.

It is an amenable number.

2145650205601 is a deficient number, since it is larger than the sum of its proper divisors (341184018527).

2145650205601 is a wasteful number, since it uses less digits than its factorization.

2145650205601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216972.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 2145650205601 in words is "two trillion, one hundred forty-five billion, six hundred fifty million, two hundred five thousand, six hundred one".