40012420452 has 12 divisors (see below), whose sum is σ = 93362314416. Its totient is φ = 13337473480.

The previous prime is 40012420451. The next prime is 40012420457. The reversal of 40012420452 is 25402421004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (40012420451) 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, 1667184174 + ... + 1667184197.

It is an arithmetic number, because the mean of its divisors is an integer number (7780192868).

Almost surely, 2^40012420452 is an apocalyptic number.

It is an amenable number.

40012420452 is an abundant number, since it is smaller than the sum of its proper divisors (53349893964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40012420452 is a wasteful number, since it uses less digits than its factorization.

40012420452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334368378 (or 3334368376 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 40012420452 its reverse (25402421004), we get a palindrome (65414841456).

The spelling of 40012420452 in words is "forty billion, twelve million, four hundred twenty thousand, four hundred fifty-two".