42061301977 has 2 divisors, whose sum is σ = 42061301978. Its totient is φ = 42061301976.

The previous prime is 42061301969. The next prime is 42061302037. The reversal of 42061301977 is 77910316024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21412761561 + 20648540416 = 146331^2 + 143696^2 .

It is a cyclic number.

It is not a de Polignac number, because 42061301977 - 2³ = 42061301969 is a prime.

It is not a weakly prime, because it can be changed into another prime (42061304977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21030650988 + 21030650989.

It is an arithmetic number, because the mean of its divisors is an integer number (21030650989).

Almost surely, 2^42061301977 is an apocalyptic number.

It is an amenable number.

42061301977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42061301977 is an equidigital number, since it uses as much as digits as its factorization.

42061301977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 42061301977 in words is "forty-two billion, sixty-one million, three hundred one thousand, nine hundred seventy-seven".