40531279842 has 12 divisors (see below), whose sum is σ = 87817773030. Its totient is φ = 13510426608.

The previous prime is 40531279787. The next prime is 40531279847. The reversal of 40531279842 is 24897213504.

40531279842 is a `hidden beast` number, since 4 + 0 + 531 + 2 + 79 + 8 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 32906322801 + 7624957041 = 181401^2 + 87321^2 .

It is not an unprimeable number, because it can be changed into a prime (40531279847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1125868867 + ... + 1125868902.

Almost surely, 2^40531279842 is an apocalyptic number.

40531279842 is an abundant number, since it is smaller than the sum of its proper divisors (47286493188).

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

40531279842 is a wasteful number, since it uses less digits than its factorization.

40531279842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251737777 (or 2251737774 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 40531279842 in words is "forty billion, five hundred thirty-one million, two hundred seventy-nine thousand, eight hundred forty-two".