40187657730 has 64 divisors (see below), whose sum is σ = 105398350848. Its totient is φ = 9725818560.

The previous prime is 40187657723. The next prime is 40187657747. The reversal of 40187657730 is 3775678104.

It is a self number, because there is not a number n which added to its sum of digits gives 40187657730.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89979 + ... + 297441.

It is an arithmetic number, because the mean of its divisors is an integer number (1646849232).

Almost surely, 2^40187657730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40187657730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52699175424).

40187657730 is an abundant number, since it is smaller than the sum of its proper divisors (65210693118).

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

40187657730 is a wasteful number, since it uses less digits than its factorization.

40187657730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208071.

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 40187657730 in words is "forty billion, one hundred eighty-seven million, six hundred fifty-seven thousand, seven hundred thirty".