61081509260871 has 16 divisors (see below), whose sum is σ = 98717590725120. Its totient is φ = 37019096521560.

The previous prime is 61081509260861. The next prime is 61081509260881. The reversal of 61081509260871 is 17806290518016.

It is a happy number.

61081509260871 is a `hidden beast` number, since 6 + 1 + 0 + 8 + 1 + 509 + 2 + 60 + 8 + 71 = 666.

It is an interprime number because it is at equal distance from previous prime (61081509260861) and next prime (61081509260881).

It is not a de Polignac number, because 61081509260871 - 2⁵ = 61081509260839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61081509260861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102830823375 + ... + 102830823968.

It is an arithmetic number, because the mean of its divisors is an integer number (6169849420320).

Almost surely, 2^{61081509260871} is an apocalyptic number.

61081509260871 is a deficient number, since it is larger than the sum of its proper divisors (37636081464249).

61081509260871 is a wasteful number, since it uses less digits than its factorization.

61081509260871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205661647363 (or 205661647357 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

Adding to 61081509260871 its reverse (17806290518016), we get a palindrome (78887799778887).

The spelling of 61081509260871 in words is "sixty-one trillion, eighty-one billion, five hundred nine million, two hundred sixty thousand, eight hundred seventy-one".