64549694546 has 4 divisors (see below), whose sum is σ = 96824541822. Its totient is φ = 32274847272.

The previous prime is 64549694491. The next prime is 64549694551.

64549694546 is nontrivially palindromic in base 10.

64549694546 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.

It can be written as a sum of positive squares in only one way, i.e., 62230790521 + 2318904025 = 249461^2 + 48155^2 .

It is a super-2 number, since 2×64549694546² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16137423635 + ... + 16137423638.

Almost surely, 2^64549694546 is an apocalyptic number.

64549694546 is a deficient number, since it is larger than the sum of its proper divisors (32274847276).

64549694546 is a wasteful number, since it uses less digits than its factorization.

64549694546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32274847275.

The product of its digits is 111974400, while the sum is 62.

The spelling of 64549694546 in words is "sixty-four billion, five hundred forty-nine million, six hundred ninety-four thousand, five hundred forty-six".