65913479881 has 2 divisors, whose sum is σ = 65913479882. Its totient is φ = 65913479880.

The previous prime is 65913479869. The next prime is 65913479953. The reversal of 65913479881 is 18897431956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64330713225 + 1582766656 = 253635^2 + 39784^2 .

It is a cyclic number.

It is not a de Polignac number, because 65913479881 - 2³³ = 57323545289 is a prime.

It is a super-2 number, since 2×65913479881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65913474881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32956739940 + 32956739941.

It is an arithmetic number, because the mean of its divisors is an integer number (32956739941).

Almost surely, 2^65913479881 is an apocalyptic number.

It is an amenable number.

65913479881 is a deficient number, since it is larger than the sum of its proper divisors (1).

65913479881 is an equidigital number, since it uses as much as digits as its factorization.

65913479881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 61.

The spelling of 65913479881 in words is "sixty-five billion, nine hundred thirteen million, four hundred seventy-nine thousand, eight hundred eighty-one".