64819732569061 has 4 divisors (see below), whose sum is σ = 66910691684224. Its totient is φ = 62728773453900.

The previous prime is 64819732569047. The next prime is 64819732569101. The reversal of 64819732569061 is 16096523791846.

64819732569061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64819732569061 - 2¹¹ = 64819732567013 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 (64819732561061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045479557535 + ... + 1045479557596.

It is an arithmetic number, because the mean of its divisors is an integer number (16727672921056).

It is a 1-persistent number, because it is pandigital, but 2⋅64819732569061 = 129639465138122 is not.

Almost surely, 2^{64819732569061} is an apocalyptic number.

It is an amenable number.

64819732569061 is a deficient number, since it is larger than the sum of its proper divisors (2090959115163).

64819732569061 is a wasteful number, since it uses less digits than its factorization.

64819732569061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090959115162.

The product of its (nonzero) digits is 117573120, while the sum is 67.

The spelling of 64819732569061 in words is "sixty-four trillion, eight hundred nineteen billion, seven hundred thirty-two million, five hundred sixty-nine thousand, sixty-one".