40485557680 has 20 divisors (see below), whose sum is σ = 94128921792. Its totient is φ = 16194223040.

The previous prime is 40485557669. The next prime is 40485557737. The reversal of 40485557680 is 8675558404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253034656 + ... + 253034815.

Almost surely, 2^40485557680 is an apocalyptic number.

40485557680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40485557680 is an abundant number, since it is smaller than the sum of its proper divisors (53643364112).

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

40485557680 is a wasteful number, since it uses less digits than its factorization.

40485557680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506069484 (or 506069478 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 52.

The spelling of 40485557680 in words is "forty billion, four hundred eighty-five million, five hundred fifty-seven thousand, six hundred eighty".