64673823542 has 4 divisors (see below), whose sum is σ = 97010735316. Its totient is φ = 32336911770.

The previous prime is 64673823541. The next prime is 64673823547. The reversal of 64673823542 is 24532837646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24532837646 = 2 ⋅12266418823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64673823541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16168455884 + ... + 16168455887.

It is an arithmetic number, because the mean of its divisors is an integer number (24252683829).

Almost surely, 2^64673823542 is an apocalyptic number.

64673823542 is a deficient number, since it is larger than the sum of its proper divisors (32336911774).

64673823542 is a wasteful number, since it uses less digits than its factorization.

64673823542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32336911773.

The product of its digits is 5806080, while the sum is 50.

The spelling of 64673823542 in words is "sixty-four billion, six hundred seventy-three million, eight hundred twenty-three thousand, five hundred forty-two".