40155121000 has 64 divisors (see below), whose sum is σ = 94181003280. Its totient is φ = 16024780800.

The previous prime is 40155120983. The next prime is 40155121033. The reversal of 40155121000 is 12155104.

It can be written as a sum of positive squares in 8 ways, for example, as 35832196 + 40119288804 = 5986^2 + 200298^2 .

It is a super-2 number, since 2×40155121000² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386632 + ... + 479368.

Almost surely, 2^40155121000 is an apocalyptic number.

40155121000 is a gapful number since it is divisible by the number (40) 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 40155121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47090501640).

40155121000 is an abundant number, since it is smaller than the sum of its proper divisors (54025882280).

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

40155121000 is a wasteful number, since it uses less digits than its factorization.

40155121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93191 (or 93177 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 40155121000 its reverse (12155104), we get a palindrome (40167276104).

The spelling of 40155121000 in words is "forty billion, one hundred fifty-five million, one hundred twenty-one thousand".