65398629541061 has 4 divisors (see below), whose sum is σ = 66470738222124. Its totient is φ = 64326520860000.

The previous prime is 65398629541033. The next prime is 65398629541087. The reversal of 65398629541061 is 16014592689356.

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 5727793944961 + 59670835596100 = 2393281^2 + 7724690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65398629541061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65398629540061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536054340440 + ... + 536054340561.

It is an arithmetic number, because the mean of its divisors is an integer number (16617684555531).

Almost surely, 2^{65398629541061} is an apocalyptic number.

65398629541061 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

65398629541061 is a deficient number, since it is larger than the sum of its proper divisors (1072108681063).

65398629541061 is a wasteful number, since it uses less digits than its factorization.

65398629541061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072108681062.

The product of its (nonzero) digits is 83980800, while the sum is 65.

The spelling of 65398629541061 in words is "sixty-five trillion, three hundred ninety-eight billion, six hundred twenty-nine million, five hundred forty-one thousand, sixty-one".