40280824642 has 4 divisors (see below), whose sum is σ = 60421236966. Its totient is φ = 20140412320.

The previous prime is 40280824631. The next prime is 40280824667. The reversal of 40280824642 is 24642808204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38188585561 + 2092239081 = 195419^2 + 45741^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40280824595 and 40280824604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10070206159 + ... + 10070206162.

Almost surely, 2^40280824642 is an apocalyptic number.

40280824642 is a deficient number, since it is larger than the sum of its proper divisors (20140412324).

40280824642 is a wasteful number, since it uses less digits than its factorization.

40280824642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20140412323.

The product of its (nonzero) digits is 196608, while the sum is 40.

The spelling of 40280824642 in words is "forty billion, two hundred eighty million, eight hundred twenty-four thousand, six hundred forty-two".