64478686632370 has 8 divisors (see below), whose sum is σ = 116061635938284. Its totient is φ = 25791474652944.

The previous prime is 64478686632361. The next prime is 64478686632377. The reversal of 64478686632370 is 7323668687446.

It can be written as a sum of positive squares in 2 ways, for example, as 57870450351169 + 6608236281201 = 7607263^2 + 2570649^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 64478686632370.

It is not an unprimeable number, because it can be changed into a prime (64478686632377) 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, 3223934331609 + ... + 3223934331628.

Almost surely, 2^{64478686632370} is an apocalyptic number.

64478686632370 is a deficient number, since it is larger than the sum of its proper divisors (51582949305914).

64478686632370 is a wasteful number, since it uses less digits than its factorization.

64478686632370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6447868663244.

The product of its (nonzero) digits is 1170505728, while the sum is 70.

The spelling of 64478686632370 in words is "sixty-four trillion, four hundred seventy-eight billion, six hundred eighty-six million, six hundred thirty-two thousand, three hundred seventy".