64387142738 has 8 divisors (see below), whose sum is σ = 97665890940. Its totient is φ = 31831845760.

The previous prime is 64387142713. The next prime is 64387142741. The reversal of 64387142738 is 83724178346.

It can be written as a sum of positive squares in 2 ways, for example, as 50968932169 + 13418210569 = 225763^2 + 115837^2 .

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

It is a super-2 number, since 2×64387142738² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64387142738.

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, 180862583 + ... + 180862938.

Almost surely, 2^64387142738 is an apocalyptic number.

64387142738 is a deficient number, since it is larger than the sum of its proper divisors (33278748202).

64387142738 is a wasteful number, since it uses less digits than its factorization.

64387142738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361725612.

The product of its digits is 5419008, while the sum is 53.

The spelling of 64387142738 in words is "sixty-four billion, three hundred eighty-seven million, one hundred forty-two thousand, seven hundred thirty-eight".