42774875021 has 8 divisors (see below), whose sum is σ = 43598305464. Its totient is φ = 41959249920.

The previous prime is 42774874991. The next prime is 42774875027. The reversal of 42774875021 is 12057847724.

It can be written as a sum of positive squares in 4 ways, for example, as 199092100 + 42575782921 = 14110^2 + 206339^2 .

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 42774875021 - 2¹⁰ = 42774873997 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 (42774875027) 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, 1940270 + ... + 1962191.

It is an arithmetic number, because the mean of its divisors is an integer number (5449788183).

Almost surely, 2^42774875021 is an apocalyptic number.

It is an amenable number.

42774875021 is a deficient number, since it is larger than the sum of its proper divisors (823430443).

42774875021 is a wasteful number, since it uses less digits than its factorization.

42774875021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902671.

The product of its (nonzero) digits is 878080, while the sum is 47.

The spelling of 42774875021 in words is "forty-two billion, seven hundred seventy-four million, eight hundred seventy-five thousand, twenty-one".