855631070501 has 2 divisors, whose sum is σ = 855631070502. Its totient is φ = 855631070500.

The previous prime is 855631070461. The next prime is 855631070573. The reversal of 855631070501 is 105070136558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781369370401 + 74261700100 = 883951^2 + 272510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855631070501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855631670501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427815535250 + 427815535251.

It is an arithmetic number, because the mean of its divisors is an integer number (427815535251).

Almost surely, 2^855631070501 is an apocalyptic number.

It is an amenable number.

855631070501 is a deficient number, since it is larger than the sum of its proper divisors (1).

855631070501 is an equidigital number, since it uses as much as digits as its factorization.

855631070501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 855631070501 in words is "eight hundred fifty-five billion, six hundred thirty-one million, seventy thousand, five hundred one".