64215842638 has 8 divisors (see below), whose sum is σ = 96325119720. Its totient is φ = 32107469400.

The previous prime is 64215842623. The next prime is 64215842651. The reversal of 64215842638 is 83624851246.

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

It is a junction number, because it is equal to n+sod(n) for n = 64215842591 and 64215842600.

It is a congruent number.

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, 5208 + ... + 358411.

It is an arithmetic number, because the mean of its divisors is an integer number (12040639965).

Almost surely, 2^64215842638 is an apocalyptic number.

64215842638 is a deficient number, since it is larger than the sum of its proper divisors (32109277082).

64215842638 is a wasteful number, since it uses less digits than its factorization.

64215842638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451922.

The product of its digits is 2211840, while the sum is 49.

The spelling of 64215842638 in words is "sixty-four billion, two hundred fifteen million, eight hundred forty-two thousand, six hundred thirty-eight".