15377210005681 has 2 divisors, whose sum is σ = 15377210005682. Its totient is φ = 15377210005680.

The previous prime is 15377210005673. The next prime is 15377210005687. The reversal of 15377210005681 is 18650001277351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14878639856656 + 498570149025 = 3857284^2 + 706095^2 .

It is an emirp because it is prime and its reverse (18650001277351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15377210005681 - 2³ = 15377210005673 is a prime.

It is a super-2 number, since 2×15377210005681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15377210005687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7688605002840 + 7688605002841.

It is an arithmetic number, because the mean of its divisors is an integer number (7688605002841).

Almost surely, 2^{15377210005681} is an apocalyptic number.

It is an amenable number.

15377210005681 is a deficient number, since it is larger than the sum of its proper divisors (1).

15377210005681 is an equidigital number, since it uses as much as digits as its factorization.

15377210005681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352800, while the sum is 46.

The spelling of 15377210005681 in words is "fifteen trillion, three hundred seventy-seven billion, two hundred ten million, five thousand, six hundred eighty-one".