1477859365681 has 2 divisors, whose sum is σ = 1477859365682. Its totient is φ = 1477859365680.

The previous prime is 1477859365573. The next prime is 1477859365687. The reversal of 1477859365681 is 1865639587741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089082175281 + 388777190400 = 1043591^2 + 623520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1477859365681 - 2⁷ = 1477859365553 is a prime.

It is a super-2 number, since 2×1477859365681² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1477859365681.

It is not a weakly prime, because it can be changed into another prime (1477859365687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 738929682840 + 738929682841.

It is an arithmetic number, because the mean of its divisors is an integer number (738929682841).

Almost surely, 2^{1477859365681} is an apocalyptic number.

It is an amenable number.

1477859365681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1477859365681 is an equidigital number, since it uses as much as digits as its factorization.

1477859365681 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 1477859365681 in words is "one trillion, four hundred seventy-seven billion, eight hundred fifty-nine million, three hundred sixty-five thousand, six hundred eighty-one".