2045644735540 has 48 divisors (see below), whose sum is σ = 4924115868672. Its totient is φ = 699282694656.

The previous prime is 2045644735523. The next prime is 2045644735559. The reversal of 2045644735540 is 455374465402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21631972 + ... + 21726331.

It is an arithmetic number, because the mean of its divisors is an integer number (102585747264).

Almost surely, 2^{2045644735540} is an apocalyptic number.

2045644735540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2045644735540 is an abundant number, since it is smaller than the sum of its proper divisors (2878471133132).

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

2045644735540 is a wasteful number, since it uses less digits than its factorization.

2045644735540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43358656 (or 43358654 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 49.

The spelling of 2045644735540 in words is "two trillion, forty-five billion, six hundred forty-four million, seven hundred thirty-five thousand, five hundred forty".