65637354061 has 4 divisors (see below), whose sum is σ = 65700895612. Its totient is φ = 65573812512.

The previous prime is 65637354049. The next prime is 65637354071. The reversal of 65637354061 is 16045373656.

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 54741960900 + 10895393161 = 233970^2 + 104381^2 .

It is a cyclic number.

It is not a de Polignac number, because 65637354061 - 2¹¹ = 65637352013 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 (65637354011) 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, 31769226 + ... + 31771291.

It is an arithmetic number, because the mean of its divisors is an integer number (16425223903).

Almost surely, 2^65637354061 is an apocalyptic number.

It is an amenable number.

65637354061 is a deficient number, since it is larger than the sum of its proper divisors (63541551).

65637354061 is a wasteful number, since it uses less digits than its factorization.

65637354061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63541550.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 65637354061 in words is "sixty-five billion, six hundred thirty-seven million, three hundred fifty-four thousand, sixty-one".