40681755806520 has 32 divisors (see below), whose sum is σ = 122045267419920. Its totient is φ = 10848468215040.

The previous prime is 40681755806467. The next prime is 40681755806521. The reversal of 40681755806520 is 2560855718604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40681755806521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169507315741 + ... + 169507315980.

Almost surely, 2^{40681755806520} is an apocalyptic number.

40681755806520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40681755806520 is an abundant number, since it is smaller than the sum of its proper divisors (81363511613400).

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

40681755806520 is a wasteful number, since it uses less digits than its factorization.

40681755806520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339014631735 (or 339014631731 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 57.

The spelling of 40681755806520 in words is "forty trillion, six hundred eighty-one billion, seven hundred fifty-five million, eight hundred six thousand, five hundred twenty".