40581138312 has 96 divisors (see below), whose sum is σ = 129121836480. Its totient is φ = 11351364480.

The previous prime is 40581138293. The next prime is 40581138397. The reversal of 40581138312 is 21383118504.

40581138312 is a `hidden beast` number, since 40 + 581 + 1 + 3 + 8 + 31 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1960428 + ... + 1981019.

It is an arithmetic number, because the mean of its divisors is an integer number (1345019130).

Almost surely, 2^40581138312 is an apocalyptic number.

It is an amenable number.

40581138312 is an abundant number, since it is smaller than the sum of its proper divisors (88540698168).

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

40581138312 is a wasteful number, since it uses less digits than its factorization.

40581138312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941483 (or 3941476 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 40581138312 in words is "forty billion, five hundred eighty-one million, one hundred thirty-eight thousand, three hundred twelve".