40179000991 has 8 divisors (see below), whose sum is σ = 40581494784. Its totient is φ = 39776599200.

The previous prime is 40179000989. The next prime is 40179001087. The reversal of 40179000991 is 19900097104.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40179000991 - 2¹ = 40179000989 is a prime.

It is a super-2 number, since 2×40179000991² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40179000941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154146 + ... + 1188448.

It is an arithmetic number, because the mean of its divisors is an integer number (5072686848).

Almost surely, 2^40179000991 is an apocalyptic number.

40179000991 is a deficient number, since it is larger than the sum of its proper divisors (402493793).

40179000991 is a wasteful number, since it uses less digits than its factorization.

40179000991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46001.

The product of its (nonzero) digits is 20412, while the sum is 40.

The spelling of 40179000991 in words is "forty billion, one hundred seventy-nine million, nine hundred ninety-one", and thus it is an aban number.