1856473815697 has 2 divisors, whose sum is σ = 1856473815698. Its totient is φ = 1856473815696.

The previous prime is 1856473815587. The next prime is 1856473815727. The reversal of 1856473815697 is 7965183746581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1370213054721 + 486260760976 = 1170561^2 + 697324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1856473815697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1856473815197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 928236907848 + 928236907849.

It is an arithmetic number, because the mean of its divisors is an integer number (928236907849).

Almost surely, 2^{1856473815697} is an apocalyptic number.

It is an amenable number.

1856473815697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1856473815697 is an equidigital number, since it uses as much as digits as its factorization.

1856473815697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 304819200, while the sum is 70.

The spelling of 1856473815697 in words is "one trillion, eight hundred fifty-six billion, four hundred seventy-three million, eight hundred fifteen thousand, six hundred ninety-seven".