40401131129 has 4 divisors (see below), whose sum is σ = 41163416676. Its totient is φ = 39638845584.

The previous prime is 40401131123. The next prime is 40401131167. The reversal of 40401131129 is 92113110404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23410530025 + 16990601104 = 153005^2 + 130348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40401131129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40401131098 and 40401131107.

It is not an unprimeable number, because it can be changed into a prime (40401131123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381142694 + ... + 381142799.

It is an arithmetic number, because the mean of its divisors is an integer number (10290854169).

Almost surely, 2^40401131129 is an apocalyptic number.

It is an amenable number.

40401131129 is a deficient number, since it is larger than the sum of its proper divisors (762285547).

40401131129 is an equidigital number, since it uses as much as digits as its factorization.

40401131129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762285546.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 40401131129 in words is "forty billion, four hundred one million, one hundred thirty-one thousand, one hundred twenty-nine".