40638267488 has 96 divisors (see below), whose sum is σ = 98883348480. Its totient is φ = 16009136640.

The previous prime is 40638267451. The next prime is 40638267493. The reversal of 40638267488 is 88476283604.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 666773 + ... + 725163.

It is an arithmetic number, because the mean of its divisors is an integer number (1030034880).

Almost surely, 2^40638267488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40638267488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49441674240).

40638267488 is an abundant number, since it is smaller than the sum of its proper divisors (58245080992).

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

40638267488 is a wasteful number, since it uses less digits than its factorization.

40638267488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58660 (or 58652 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 56.

The spelling of 40638267488 in words is "forty billion, six hundred thirty-eight million, two hundred sixty-seven thousand, four hundred eighty-eight".