6445846540044 has 72 divisors (see below), whose sum is σ = 17653330815120. Its totient is φ = 1975197837312.

The previous prime is 6445846540031. The next prime is 6445846540103. The reversal of 6445846540044 is 4400456485446.

6445846540044 is a `hidden beast` number, since 6 + 4 + 4 + 58 + 4 + 6 + 540 + 0 + 44 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122443789 + ... + 122496420.

It is an arithmetic number, because the mean of its divisors is an integer number (245185150210).

Almost surely, 2^{6445846540044} is an apocalyptic number.

It is an amenable number.

6445846540044 is an abundant number, since it is smaller than the sum of its proper divisors (11207484275076).

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

6445846540044 is a wasteful number, since it uses less digits than its factorization.

6445846540044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244940279 (or 244940274 counting only the distinct ones).

The product of its (nonzero) digits is 29491200, while the sum is 54.

The spelling of 6445846540044 in words is "six trillion, four hundred forty-five billion, eight hundred forty-six million, five hundred forty thousand, forty-four".