45805978644 has 72 divisors (see below), whose sum is σ = 115680223008. Its totient is φ = 14099304960.

The previous prime is 45805978571. The next prime is 45805978667. The reversal of 45805978644 is 44687950854.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 59199 + ... + 308409.

It is an arithmetic number, because the mean of its divisors is an integer number (1606669764).

Almost surely, 2^45805978644 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 45805978644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57840111504).

45805978644 is an abundant number, since it is smaller than the sum of its proper divisors (69874244364).

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

45805978644 is a wasteful number, since it uses less digits than its factorization.

45805978644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249305 (or 249286 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 60.

The spelling of 45805978644 in words is "forty-five billion, eight hundred five million, nine hundred seventy-eight thousand, six hundred forty-four".