65213667948005 has 4 divisors (see below), whose sum is σ = 78256401537612. Its totient is φ = 52170934358400.

The previous prime is 65213667947999. The next prime is 65213667948019. The reversal of 65213667948005 is 50084976631256.

It is a Cunningham number, because it is equal to 8075498²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23476912708804 + 41736755239201 = 4845298^2 + 6460399^2 .

It is not a de Polignac number, because 65213667948005 - 2¹² = 65213667943909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6521366794796 + ... + 6521366794805.

It is an arithmetic number, because the mean of its divisors is an integer number (19564100384403).

It is a 2-persistent number, because it is pandigital, and so is 2⋅65213667948005 = 130427335896010, but 3⋅65213667948005 = 195641003844015 is not.

Almost surely, 2^{65213667948005} is an apocalyptic number.

It is an amenable number.

65213667948005 is a deficient number, since it is larger than the sum of its proper divisors (13042733589607).

65213667948005 is a wasteful number, since it uses less digits than its factorization.

65213667948005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13042733589606.

The product of its (nonzero) digits is 65318400, while the sum is 62.

The spelling of 65213667948005 in words is "sixty-five trillion, two hundred thirteen billion, six hundred sixty-seven million, nine hundred forty-eight thousand, five".