40553986644 has 36 divisors (see below), whose sum is σ = 102582442144. Its totient is φ = 13508636112.

The previous prime is 40553986621. The next prime is 40553986663. The reversal of 40553986644 is 44668935504.

40553986644 is a `hidden beast` number, since 4 + 0 + 5 + 539 + 8 + 66 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 337162 + ... + 441345.

Almost surely, 2^40553986644 is an apocalyptic number.

It is an amenable number.

40553986644 is an abundant number, since it is smaller than the sum of its proper divisors (62028455500).

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

40553986644 is a wasteful number, since it uses less digits than its factorization.

40553986644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779964 (or 779959 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 54.

The spelling of 40553986644 in words is "forty billion, five hundred fifty-three million, nine hundred eighty-six thousand, six hundred forty-four".