64544697729146 has 8 divisors (see below), whose sum is σ = 96942946526580. Its totient is φ = 32230382220288.

The previous prime is 64544697729133. The next prime is 64544697729157. The reversal of 64544697729146 is 64192779644546.

It can be written as a sum of positive squares in 2 ways, for example, as 64416049973521 + 128647755625 = 8025961^2 + 358675^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20983320221 + ... + 20983323296.

Almost surely, 2^{64544697729146} is an apocalyptic number.

64544697729146 is a deficient number, since it is larger than the sum of its proper divisors (32398248797434).

64544697729146 is a wasteful number, since it uses less digits than its factorization.

64544697729146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41966644288.

The product of its digits is 2194698240, while the sum is 74.

The spelling of 64544697729146 in words is "sixty-four trillion, five hundred forty-four billion, six hundred ninety-seven million, seven hundred twenty-nine thousand, one hundred forty-six".