40161361240 has 256 divisors, whose sum is σ = 122540221440. Its totient is φ = 11439360000.

The previous prime is 40161361223. The next prime is 40161361241. The reversal of 40161361240 is 4216316104.

It is a super-2 number, since 2×40161361240² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 40161361199 and 40161361208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40161361241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4039075 + ... + 4049005.

It is an arithmetic number, because the mean of its divisors is an integer number (478672740).

Almost surely, 2^40161361240 is an apocalyptic number.

40161361240 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 40161361240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61270110720).

40161361240 is an abundant number, since it is smaller than the sum of its proper divisors (82378860200).

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

40161361240 is a wasteful number, since it uses less digits than its factorization.

40161361240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10074 (or 10070 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 40161361240 its reverse (4216316104), we get a palindrome (44377677344).

The spelling of 40161361240 in words is "forty billion, one hundred sixty-one million, three hundred sixty-one thousand, two hundred forty".