42190931077 has 2 divisors, whose sum is σ = 42190931078. Its totient is φ = 42190931076.

The previous prime is 42190931051. The next prime is 42190931129. The reversal of 42190931077 is 77013909124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33229279521 + 8961651556 = 182289^2 + 94666^2 .

It is a cyclic number.

It is not a de Polignac number, because 42190931077 - 2²³ = 42182542469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42190938077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21095465538 + 21095465539.

It is an arithmetic number, because the mean of its divisors is an integer number (21095465539).

Almost surely, 2^42190931077 is an apocalyptic number.

It is an amenable number.

42190931077 is a deficient number, since it is larger than the sum of its proper divisors (1).

42190931077 is an equidigital number, since it uses as much as digits as its factorization.

42190931077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The spelling of 42190931077 in words is "forty-two billion, one hundred ninety million, nine hundred thirty-one thousand, seventy-seven".