64394051438 has 8 divisors (see below), whose sum is σ = 101674818120. Its totient is φ = 30502445400.

The previous prime is 64394051431. The next prime is 64394051507. The reversal of 64394051438 is 83415049346.

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 = 64394051392 and 64394051401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64394051431) 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, 847290113 + ... + 847290188.

It is an arithmetic number, because the mean of its divisors is an integer number (12709352265).

Almost surely, 2^64394051438 is an apocalyptic number.

64394051438 is a deficient number, since it is larger than the sum of its proper divisors (37280766682).

64394051438 is a wasteful number, since it uses less digits than its factorization.

64394051438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694580322.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 64394051438 in words is "sixty-four billion, three hundred ninety-four million, fifty-one thousand, four hundred thirty-eight".