2145144045040 has 40 divisors (see below), whose sum is σ = 5249957798160. Its totient is φ = 812896690176.

The previous prime is 2145144045001. The next prime is 2145144045041. The reversal of 2145144045040 is 405404415412.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2145144044987 and 2145144045005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145144045041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705637969 + ... + 705641008.

It is an arithmetic number, because the mean of its divisors is an integer number (131248944954).

Almost surely, 2^{2145144045040} is an apocalyptic number.

2145144045040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145144045040 is an abundant number, since it is smaller than the sum of its proper divisors (3104813753120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145144045040 is a wasteful number, since it uses less digits than its factorization.

2145144045040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411279009 (or 1411279003 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 34.

The spelling of 2145144045040 in words is "two trillion, one hundred forty-five billion, one hundred forty-four million, forty-five thousand, forty".