64476505061 has 4 divisors (see below), whose sum is σ = 67279831392. Its totient is φ = 61673178732.

The previous prime is 64476505039. The next prime is 64476505063. The reversal of 64476505061 is 16050567446.

64476505061 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, and also an emirpimes, since its reverse is a distinct semiprime: 16050567446 = 2 ⋅8025283723.

It is a cyclic number.

It is not a de Polignac number, because 64476505061 - 2¹⁴ = 64476488677 is a prime.

It is a super-2 number, since 2×64476505061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64476505063) 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, 1401663131 + ... + 1401663176.

It is an arithmetic number, because the mean of its divisors is an integer number (16819957848).

Almost surely, 2^64476505061 is an apocalyptic number.

It is an amenable number.

64476505061 is a deficient number, since it is larger than the sum of its proper divisors (2803326331).

64476505061 is a wasteful number, since it uses less digits than its factorization.

64476505061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803326330.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 64476505061 in words is "sixty-four billion, four hundred seventy-six million, five hundred five thousand, sixty-one".