855515853481 has 9 divisors (see below), whose sum is σ = 862423656861. Its totient is φ = 848662965612.

The previous prime is 855515853463. The next prime is 855515853503. The reversal of 855515853481 is 184358515558.

The square root of 855515853481 is 924941.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 855515853481 - 2⁹ = 855515852969 is a prime.

It is a super-2 number, since 2×855515853481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855515853461) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 117463866 + ... + 117471148.

Almost surely, 2^855515853481 is an apocalyptic number.

855515853481 is the 924941-st square number.

855515853481 is the 462471-st centered octagonal number.

It is an amenable number.

855515853481 is a deficient number, since it is larger than the sum of its proper divisors (6907803380).

855515853481 is an frugal number, since it uses more digits than its factorization.

855515853481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14820 (or 7410 counting only the distinct ones).

The product of its digits is 19200000, while the sum is 58.

The spelling of 855515853481 in words is "eight hundred fifty-five billion, five hundred fifteen million, eight hundred fifty-three thousand, four hundred eighty-one".