40020155532 has 216 divisors, whose sum is σ = 125510046480. Its totient is φ = 10683187200.

The previous prime is 40020155501. The next prime is 40020155551. The reversal of 40020155532 is 23555102004.

It is a happy number.

40020155532 is a `hidden beast` number, since 400 + 201 + 5 + 5 + 53 + 2 = 666.

It is a super-2 number, since 2×40020155532² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40020155496 and 40020155505.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4163532 + ... + 4173132.

It is an arithmetic number, because the mean of its divisors is an integer number (581065030).

Almost surely, 2^40020155532 is an apocalyptic number.

40020155532 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 40020155532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62755023240).

40020155532 is an abundant number, since it is smaller than the sum of its proper divisors (85489890948).

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

40020155532 is a wasteful number, since it uses less digits than its factorization.

40020155532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9781 (or 9769 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 40020155532 its reverse (23555102004), we get a palindrome (63575257536).

The spelling of 40020155532 in words is "forty billion, twenty million, one hundred fifty-five thousand, five hundred thirty-two".