40000423145 has 8 divisors (see below), whose sum is σ = 48906178056. Its totient is φ = 31396558336.

The previous prime is 40000423123. The next prime is 40000423163. The reversal of 40000423145 is 54132400004.

It can be written as a sum of positive squares in 4 ways, for example, as 9239823376 + 30760599769 = 96124^2 + 175387^2 .

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 40000423145 - 2⁶ = 40000423081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40000423145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75472232 + ... + 75472761.

It is an arithmetic number, because the mean of its divisors is an integer number (6113272257).

Almost surely, 2^40000423145 is an apocalyptic number.

It is an amenable number.

40000423145 is a deficient number, since it is larger than the sum of its proper divisors (8905754911).

40000423145 is a wasteful number, since it uses less digits than its factorization.

40000423145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150945051.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 40000423145 its reverse (54132400004), we get a palindrome (94132823149).

The spelling of 40000423145 in words is "forty billion, four hundred twenty-three thousand, one hundred forty-five".