40212511640 has 64 divisors (see below), whose sum is σ = 103423426560. Its totient is φ = 13784503680.

The previous prime is 40212511607. The next prime is 40212511663. The reversal of 40212511640 is 4611521204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1947209 + ... + 1967751.

It is an arithmetic number, because the mean of its divisors is an integer number (1615991040).

Almost surely, 2^40212511640 is an apocalyptic number.

40212511640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40212511640 is an abundant number, since it is smaller than the sum of its proper divisors (63210914920).

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

40212511640 is a wasteful number, since it uses less digits than its factorization.

40212511640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27552 (or 27548 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 40212511640 in words is "forty billion, two hundred twelve million, five hundred eleven thousand, six hundred forty".