40640442642 has 48 divisors (see below), whose sum is σ = 88333959168. Its totient is φ = 13503853440.

The previous prime is 40640442637. The next prime is 40640442659. The reversal of 40640442642 is 24624404604.

40640442642 is a `hidden beast` number, since 4 + 0 + 6 + 4 + 0 + 4 + 4 + 2 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 40640442597 and 40640442606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11340783 + ... + 11344365.

It is an arithmetic number, because the mean of its divisors is an integer number (1840290816).

Almost surely, 2^40640442642 is an apocalyptic number.

40640442642 is an abundant number, since it is smaller than the sum of its proper divisors (47693516526).

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

40640442642 is a wasteful number, since it uses less digits than its factorization.

40640442642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5415 (or 5412 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 36.

The spelling of 40640442642 in words is "forty billion, six hundred forty million, four hundred forty-two thousand, six hundred forty-two".