40088972561 has 16 divisors (see below), whose sum is σ = 46605846528. Its totient is φ = 34118264400.

The previous prime is 40088972557. The next prime is 40088972563. The reversal of 40088972561 is 16527988004.

40088972561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40088972561 - 2² = 40088972557 is a prime.

It is a super-3 number, since 3×40088972561³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40088972563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1673795 + ... + 1697576.

It is an arithmetic number, because the mean of its divisors is an integer number (2912865408).

Almost surely, 2^40088972561 is an apocalyptic number.

It is an amenable number.

40088972561 is a deficient number, since it is larger than the sum of its proper divisors (6516873967).

40088972561 is a wasteful number, since it uses less digits than its factorization.

40088972561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371452.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 40088972561 in words is "forty billion, eighty-eight million, nine hundred seventy-two thousand, five hundred sixty-one".