42376156115561 has 2 divisors, whose sum is σ = 42376156115562. Its totient is φ = 42376156115560.

The previous prime is 42376156115519. The next prime is 42376156115621. The reversal of 42376156115561 is 16551165167324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29261002510336 + 13115153605225 = 5409344^2 + 3621485^2 .

It is a cyclic number.

It is not a de Polignac number, because 42376156115561 - 2³⁸ = 42101278208617 is a prime.

It is not a weakly prime, because it can be changed into another prime (42376159115561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21188078057780 + 21188078057781.

It is an arithmetic number, because the mean of its divisors is an integer number (21188078057781).

Almost surely, 2^{42376156115561} is an apocalyptic number.

It is an amenable number.

42376156115561 is a deficient number, since it is larger than the sum of its proper divisors (1).

42376156115561 is an equidigital number, since it uses as much as digits as its factorization.

42376156115561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 53.

The spelling of 42376156115561 in words is "forty-two trillion, three hundred seventy-six billion, one hundred fifty-six million, one hundred fifteen thousand, five hundred sixty-one".