40591115664 has 80 divisors (see below), whose sum is σ = 114586933824. Its totient is φ = 12279500800.

The previous prime is 40591115659. The next prime is 40591115681. The reversal of 40591115664 is 46651119504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248284 + ... + 377924.

Almost surely, 2^40591115664 is an apocalyptic number.

40591115664 is a gapful number since it is divisible by the number (44) 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 40591115664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57293466912).

40591115664 is an abundant number, since it is smaller than the sum of its proper divisors (73995818160).

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

40591115664 is a wasteful number, since it uses less digits than its factorization.

40591115664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130256 (or 130250 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 40591115664 in words is "forty billion, five hundred ninety-one million, one hundred fifteen thousand, six hundred sixty-four".