42786400665551 has 2 divisors, whose sum is σ = 42786400665552. Its totient is φ = 42786400665550.

The previous prime is 42786400665539. The next prime is 42786400665563. The reversal of 42786400665551 is 15556600468724.

It is a balanced prime because it is at equal distance from previous prime (42786400665539) and next prime (42786400665563).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42786400665551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42786400665251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21393200332775 + 21393200332776.

It is an arithmetic number, because the mean of its divisors is an integer number (21393200332776).

Almost surely, 2^{42786400665551} is an apocalyptic number.

42786400665551 is a deficient number, since it is larger than the sum of its proper divisors (1).

42786400665551 is an equidigital number, since it uses as much as digits as its factorization.

42786400665551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384000, while the sum is 59.

The spelling of 42786400665551 in words is "forty-two trillion, seven hundred eighty-six billion, four hundred million, six hundred sixty-five thousand, five hundred fifty-one".