40456420172 has 54 divisors (see below), whose sum is σ = 85100509116. Its totient is φ = 16779082320.

The previous prime is 40456420163. The next prime is 40456420177. The reversal of 40456420172 is 27102465404.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40456420177) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 80963 + ... + 295749.

It is an arithmetic number, because the mean of its divisors is an integer number (1575935354).

Almost surely, 2^40456420172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40456420172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42550254558).

40456420172 is an abundant number, since it is smaller than the sum of its proper divisors (44644088944).

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

40456420172 is a wasteful number, since it uses less digits than its factorization.

40456420172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214867 (or 214827 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

Adding to 40456420172 its reverse (27102465404), we get a palindrome (67558885576).

The spelling of 40456420172 in words is "forty billion, four hundred fifty-six million, four hundred twenty thousand, one hundred seventy-two".