45145555644 has 96 divisors (see below), whose sum is σ = 126924940800. Its totient is φ = 12200509440.

The previous prime is 45145555643. The next prime is 45145555669. The reversal of 45145555644 is 44655554154.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 45145555593 and 45145555602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45145555643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1000972 + ... + 1045100.

It is an arithmetic number, because the mean of its divisors is an integer number (1322134800).

Almost surely, 2^45145555644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45145555644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63462470400).

45145555644 is an abundant number, since it is smaller than the sum of its proper divisors (81779385156).

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

45145555644 is a wasteful number, since it uses less digits than its factorization.

45145555644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44803 (or 44801 counting only the distinct ones).

The product of its digits is 4800000, while the sum is 48.

The spelling of 45145555644 in words is "forty-five billion, one hundred forty-five million, five hundred fifty-five thousand, six hundred forty-four".