40647506172 has 144 divisors (see below), whose sum is σ = 118416049920. Its totient is φ = 10624932864.

The previous prime is 40647506161. The next prime is 40647506173. The reversal of 40647506172 is 27160574604.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40647506173) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1591479 + ... + 1616817.

It is an arithmetic number, because the mean of its divisors is an integer number (822333680).

Almost surely, 2^40647506172 is an apocalyptic number.

40647506172 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40647506172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59208024960).

40647506172 is an abundant number, since it is smaller than the sum of its proper divisors (77768543748).

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

40647506172 is a wasteful number, since it uses less digits than its factorization.

40647506172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25492 (or 25477 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 40647506172 in words is "forty billion, six hundred forty-seven million, five hundred six thousand, one hundred seventy-two".