64663132370 has 16 divisors (see below), whose sum is σ = 119232508248. Its totient is φ = 25234392960.

The previous prime is 64663132367. The next prime is 64663132381. The reversal of 64663132370 is 7323136646.

It can be written as a sum of positive squares in 4 ways, for example, as 36221321761 + 28441810609 = 190319^2 + 168647^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78857069 + ... + 78857888.

Almost surely, 2^64663132370 is an apocalyptic number.

64663132370 is a deficient number, since it is larger than the sum of its proper divisors (54569375878).

64663132370 is a wasteful number, since it uses less digits than its factorization.

64663132370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157715005.

The product of its (nonzero) digits is 326592, while the sum is 41.

The spelling of 64663132370 in words is "sixty-four billion, six hundred sixty-three million, one hundred thirty-two thousand, three hundred seventy".