40386639621888 has 432 divisors, whose sum is σ = 136293728648896. Its totient is φ = 11263609405440.

The previous prime is 40386639621851. The next prime is 40386639621919. The reversal of 40386639621888 is 88812693668304.

40386639621888 is a `hidden beast` number, since 4 + 0 + 386 + 6 + 3 + 9 + 62 + 188 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114025548 + ... + 114379188.

Almost surely, 2^{40386639621888} is an apocalyptic number.

40386639621888 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40386639621888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68146864324448).

40386639621888 is an abundant number, since it is smaller than the sum of its proper divisors (95907089027008).

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

40386639621888 is a wasteful number, since it uses less digits than its factorization.

40386639621888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353840 (or 353823 counting only the distinct ones).

The product of its (nonzero) digits is 573308928, while the sum is 72.

The spelling of 40386639621888 in words is "forty trillion, three hundred eighty-six billion, six hundred thirty-nine million, six hundred twenty-one thousand, eight hundred eighty-eight".