64471367512646 has 32 divisors (see below), whose sum is σ = 100761695400960. Its totient is φ = 30903628341600.

The previous prime is 64471367512639. The next prime is 64471367512661. The reversal of 64471367512646 is 64621576317446.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515127236 + ... + 515252376.

It is an arithmetic number, because the mean of its divisors is an integer number (3148802981280).

Almost surely, 2^{64471367512646} is an apocalyptic number.

64471367512646 is a deficient number, since it is larger than the sum of its proper divisors (36290327888314).

64471367512646 is a wasteful number, since it uses less digits than its factorization.

64471367512646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202940.

The product of its digits is 121927680, while the sum is 62.

The spelling of 64471367512646 in words is "sixty-four trillion, four hundred seventy-one billion, three hundred sixty-seven million, five hundred twelve thousand, six hundred forty-six".