42774387091 has 2 divisors, whose sum is σ = 42774387092. Its totient is φ = 42774387090.

The previous prime is 42774387077. The next prime is 42774387101. The reversal of 42774387091 is 19078347724.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42774387091 - 2⁵ = 42774387059 is a prime.

It is not a weakly prime, because it can be changed into another prime (42774327091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387193545 + 21387193546.

It is an arithmetic number, because the mean of its divisors is an integer number (21387193546).

Almost surely, 2^42774387091 is an apocalyptic number.

42774387091 is a deficient number, since it is larger than the sum of its proper divisors (1).

42774387091 is an equidigital number, since it uses as much as digits as its factorization.

42774387091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 42774387091 in words is "forty-two billion, seven hundred seventy-four million, three hundred eighty-seven thousand, ninety-one".