42076155576781 has 2 divisors, whose sum is σ = 42076155576782. Its totient is φ = 42076155576780.

The previous prime is 42076155576671. The next prime is 42076155576787. The reversal of 42076155576781 is 18767555167024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35384057402500 + 6692098174281 = 5948450^2 + 2586909^2 .

It is a cyclic number.

It is not a de Polignac number, because 42076155576781 - 2⁴³ = 33280062554573 is a prime.

It is a super-2 number, since 2×42076155576781² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42076155576787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21038077788390 + 21038077788391.

It is an arithmetic number, because the mean of its divisors is an integer number (21038077788391).

Almost surely, 2^{42076155576781} is an apocalyptic number.

It is an amenable number.

42076155576781 is a deficient number, since it is larger than the sum of its proper divisors (1).

42076155576781 is an equidigital number, since it uses as much as digits as its factorization.

42076155576781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784000, while the sum is 64.

The spelling of 42076155576781 in words is "forty-two trillion, seventy-six billion, one hundred fifty-five million, five hundred seventy-six thousand, seven hundred eighty-one".