42656959278977 has 2 divisors, whose sum is σ = 42656959278978. Its totient is φ = 42656959278976.

The previous prime is 42656959278889. The next prime is 42656959279001. The reversal of 42656959278977 is 77987295965624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35219999406736 + 7436959872241 = 5934644^2 + 2727079^2 .

It is a cyclic number.

It is not a de Polignac number, because 42656959278977 - 2³⁴ = 42639779409793 is a prime.

It is a super-3 number, since 3×42656959278977³ (a number of 42 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42656959278277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21328479639488 + 21328479639489.

It is an arithmetic number, because the mean of its divisors is an integer number (21328479639489).

Almost surely, 2^{42656959278977} is an apocalyptic number.

It is an amenable number.

42656959278977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42656959278977 is an equidigital number, since it uses as much as digits as its factorization.

42656959278977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28805414400, while the sum is 86.

The spelling of 42656959278977 in words is "forty-two trillion, six hundred fifty-six billion, nine hundred fifty-nine million, two hundred seventy-eight thousand, nine hundred seventy-seven".