40087144660 has 24 divisors (see below), whose sum is σ = 85771364616. Its totient is φ = 15732312960.

The previous prime is 40087144631. The next prime is 40087144667. The reversal of 40087144660 is 6644178004.

It can be written as a sum of positive squares in 4 ways, for example, as 7005355204 + 33081789456 = 83698^2 + 181884^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40087144667) 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, 18907971 + ... + 18910090.

It is an arithmetic number, because the mean of its divisors is an integer number (3573806859).

Almost surely, 2^40087144660 is an apocalyptic number.

It is an amenable number.

40087144660 is an abundant number, since it is smaller than the sum of its proper divisors (45684219956).

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

40087144660 is a wasteful number, since it uses less digits than its factorization.

40087144660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37818123 (or 37818121 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 40087144660 in words is "forty billion, eighty-seven million, one hundred forty-four thousand, six hundred sixty".