42742453621 has 8 divisors (see below), whose sum is σ = 49649314304. Its totient is φ = 36035791920.

The previous prime is 42742453583. The next prime is 42742453651. The reversal of 42742453621 is 12635424724.

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

It is a cyclic number.

It is not a de Polignac number, because 42742453621 - 2¹⁷ = 42742322549 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 (42742453651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50049285 + ... + 50050138.

It is an arithmetic number, because the mean of its divisors is an integer number (6206164288).

Almost surely, 2^42742453621 is an apocalyptic number.

It is an amenable number.

42742453621 is a deficient number, since it is larger than the sum of its proper divisors (6906860683).

42742453621 is a wasteful number, since it uses less digits than its factorization.

42742453621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100099491.

The product of its digits is 322560, while the sum is 40.

The spelling of 42742453621 in words is "forty-two billion, seven hundred forty-two million, four hundred fifty-three thousand, six hundred twenty-one".