40491749888 has 30 divisors (see below), whose sum is σ = 80913512889. Its totient is φ = 20243598336.

The previous prime is 40491749861. The next prime is 40491749923. The reversal of 40491749888 is 88894719404.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 34109657344 + 6382092544 = 184688^2 + 79888^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=142288.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40491749888.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4548770 + ... + 4557662.

Almost surely, 2^40491749888 is an apocalyptic number.

It is an amenable number.

40491749888 is a deficient number, since it is larger than the sum of its proper divisors (40421763001).

40491749888 is an frugal number, since it uses more digits than its factorization.

40491749888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17804 (or 8895 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 62.

The spelling of 40491749888 in words is "forty billion, four hundred ninety-one million, seven hundred forty-nine thousand, eight hundred eighty-eight".