40179029509 has 2 divisors, whose sum is σ = 40179029510. Its totient is φ = 40179029508.

The previous prime is 40179029483. The next prime is 40179029549. The reversal of 40179029509 is 90592097104.

It is a happy number.

40179029509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27433296900 + 12745732609 = 165630^2 + 112897^2 .

It is a cyclic number.

It is not a de Polignac number, because 40179029509 - 2⁵ = 40179029477 is a prime.

It is a super-2 number, since 2×40179029509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40179029549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20089514754 + 20089514755.

It is an arithmetic number, because the mean of its divisors is an integer number (20089514755).

Almost surely, 2^40179029509 is an apocalyptic number.

It is an amenable number.

40179029509 is a deficient number, since it is larger than the sum of its proper divisors (1).

40179029509 is an equidigital number, since it uses as much as digits as its factorization.

40179029509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 40179029509 in words is "forty billion, one hundred seventy-nine million, twenty-nine thousand, five hundred nine".