851605452472277 has 2 divisors, whose sum is σ = 851605452472278. Its totient is φ = 851605452472276.

The previous prime is 851605452472231. The next prime is 851605452472361. The reversal of 851605452472277 is 772274254506158.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840120138250276 + 11485314222001 = 28984826^2 + 3388999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851605452472277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851605452475277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425802726236138 + 425802726236139.

It is an arithmetic number, because the mean of its divisors is an integer number (425802726236139).

Almost surely, 2^{851605452472277} is an apocalyptic number.

It is an amenable number.

851605452472277 is a deficient number, since it is larger than the sum of its proper divisors (1).

851605452472277 is an equidigital number, since it uses as much as digits as its factorization.

851605452472277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 263424000, while the sum is 65.

The spelling of 851605452472277 in words is "eight hundred fifty-one trillion, six hundred five billion, four hundred fifty-two million, four hundred seventy-two thousand, two hundred seventy-seven".