42777358909 has 4 divisors (see below), whose sum is σ = 42874802080. Its totient is φ = 42679915740.

The previous prime is 42777358903. The next prime is 42777358913. The reversal of 42777358909 is 90985377724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42777358909 - 2³ = 42777358901 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 (42777358901) 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, 48720927 + ... + 48721804.

It is an arithmetic number, because the mean of its divisors is an integer number (10718700520).

Almost surely, 2^42777358909 is an apocalyptic number.

It is an amenable number.

42777358909 is a deficient number, since it is larger than the sum of its proper divisors (97443171).

42777358909 is an equidigital number, since it uses as much as digits as its factorization.

42777358909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97443170.

The product of its (nonzero) digits is 26671680, while the sum is 61.

The spelling of 42777358909 in words is "forty-two billion, seven hundred seventy-seven million, three hundred fifty-eight thousand, nine hundred nine".