42837791977 has 2 divisors, whose sum is σ = 42837791978. Its totient is φ = 42837791976.

The previous prime is 42837791963. The next prime is 42837792013. The reversal of 42837791977 is 77919773824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42299737561 + 538054416 = 205669^2 + 23196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42837791977 is a prime.

It is not a weakly prime, because it can be changed into another prime (42837791947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21418895988 + 21418895989.

It is an arithmetic number, because the mean of its divisors is an integer number (21418895989).

Almost surely, 2^42837791977 is an apocalyptic number.

It is an amenable number.

42837791977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42837791977 is an equidigital number, since it uses as much as digits as its factorization.

42837791977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37340352, while the sum is 64.

The spelling of 42837791977 in words is "forty-two billion, eight hundred thirty-seven million, seven hundred ninety-one thousand, nine hundred seventy-seven".