40781304642 has 16 divisors (see below), whose sum is σ = 87836656320. Its totient is φ = 12548093712.

The previous prime is 40781304601. The next prime is 40781304653. The reversal of 40781304642 is 24640318704.

It is a super-2 number, since 2×40781304642² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 40781304642.

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 7 ways as a sum of consecutive naturals, for example, 261418542 + ... + 261418697.

It is an arithmetic number, because the mean of its divisors is an integer number (5489791020).

Almost surely, 2^40781304642 is an apocalyptic number.

40781304642 is an abundant number, since it is smaller than the sum of its proper divisors (47055351678).

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

40781304642 is a wasteful number, since it uses less digits than its factorization.

40781304642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522837257.

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 40781304642 in words is "forty billion, seven hundred eighty-one million, three hundred four thousand, six hundred forty-two".