85012481761 has 3 divisors (see below), whose sum is σ = 85012773331. Its totient is φ = 85012190192.

The previous prime is 85012481747. The next prime is 85012481843. The reversal of 85012481761 is 16718421058.

The square root of 85012481761 is 291569.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 9145288161 + 75867193600 = 95631^2 + 275440^2 .

It is not a de Polignac number, because 85012481761 - 2⁷ = 85012481633 is a prime.

It is a super-2 number, since 2×85012481761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85012431761) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 145785 + ... + 437353.

Almost surely, 2^85012481761 is an apocalyptic number.

85012481761 is the 291569-th square number.

85012481761 is the 145785-th centered octagonal number.

It is an amenable number.

85012481761 is a deficient number, since it is larger than the sum of its proper divisors (291570).

85012481761 is an frugal number, since it uses more digits than its factorization.

85012481761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583138 (or 291569 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 85012481761 in words is "eighty-five billion, twelve million, four hundred eighty-one thousand, seven hundred sixty-one".