42774251893 has 4 divisors (see below), whose sum is σ = 43215223660. Its totient is φ = 42333280128.

The previous prime is 42774251881. The next prime is 42774251959. The reversal of 42774251893 is 39815247724.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18742431409 + 24031820484 = 136903^2 + 155022^2 .

It is a cyclic number.

It is not a de Polignac number, because 42774251893 - 2³³ = 34184317301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42774251893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42774251813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220485738 + ... + 220485931.

It is an arithmetic number, because the mean of its divisors is an integer number (10803805915).

Almost surely, 2^42774251893 is an apocalyptic number.

It is an amenable number.

42774251893 is a deficient number, since it is larger than the sum of its proper divisors (440971767).

42774251893 is an equidigital number, since it uses as much as digits as its factorization.

42774251893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440971766.

The product of its digits is 3386880, while the sum is 52.

The spelling of 42774251893 in words is "forty-two billion, seven hundred seventy-four million, two hundred fifty-one thousand, eight hundred ninety-three".