40188023618 has 8 divisors (see below), whose sum is σ = 61752329100. Its totient is φ = 19603913920.

The previous prime is 40188023609. The next prime is 40188023621. The reversal of 40188023618 is 81632088104.

It can be written as a sum of positive squares in 2 ways, for example, as 36838276489 + 3349747129 = 191933^2 + 57877^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245048843 + ... + 245049006.

Almost surely, 2^40188023618 is an apocalyptic number.

40188023618 is a deficient number, since it is larger than the sum of its proper divisors (21564305482).

40188023618 is a wasteful number, since it uses less digits than its factorization.

40188023618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490097892.

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 40188023618 in words is "forty billion, one hundred eighty-eight million, twenty-three thousand, six hundred eighteen".