42718606621 has 8 divisors (see below), whose sum is σ = 45264724344. Its totient is φ = 40176184320.

The previous prime is 42718606613. The next prime is 42718606649. The reversal of 42718606621 is 12660681724.

It can be written as a sum of positive squares in 4 ways, for example, as 13438605625 + 29280000996 = 115925^2 + 171114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42718606621 - 2³ = 42718606613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42718606681) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 900030 + ... + 946303.

It is an arithmetic number, because the mean of its divisors is an integer number (5658090543).

Almost surely, 2^42718606621 is an apocalyptic number.

It is an amenable number.

42718606621 is a deficient number, since it is larger than the sum of its proper divisors (2546117723).

42718606621 is a wasteful number, since it uses less digits than its factorization.

42718606621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847711.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 42718606621 in words is "forty-two billion, seven hundred eighteen million, six hundred six thousand, six hundred twenty-one".