40001432123 has 24 divisors (see below), whose sum is σ = 44509303008. Its totient is φ = 35756802048.

The previous prime is 40001432113. The next prime is 40001432137. The reversal of 40001432123 is 32123410004.

It is not a de Polignac number, because 40001432123 - 2⁸ = 40001431867 is a prime.

It is a super-2 number, since 2×40001432123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40001432095 and 40001432104.

It is not an unprimeable number, because it can be changed into a prime (40001432113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52017083 + ... + 52017851.

It is an arithmetic number, because the mean of its divisors is an integer number (1854554292).

Almost surely, 2^40001432123 is an apocalyptic number.

40001432123 is a deficient number, since it is larger than the sum of its proper divisors (4507870885).

40001432123 is an equidigital number, since it uses as much as digits as its factorization.

40001432123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751 (or 982 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 40001432123 its reverse (32123410004), we get a palindrome (72124842127).

The spelling of 40001432123 in words is "forty billion, one million, four hundred thirty-two thousand, one hundred twenty-three".