64651742 has 4 divisors (see below), whose sum is σ = 96977616. Its totient is φ = 32325870.

The previous prime is 64651739. The next prime is 64651789. The reversal of 64651742 is 24715646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24715646 = 2 ⋅12357823.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16162934 + ... + 16162937.

It is an arithmetic number, because the mean of its divisors is an integer number (24244404).

Almost surely, 2^64651742 is an apocalyptic number.

64651742 is a deficient number, since it is larger than the sum of its proper divisors (32325874).

64651742 is a wasteful number, since it uses less digits than its factorization.

64651742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32325873.

The product of its digits is 40320, while the sum is 35.

The square root of 64651742 is about 8040.6306966556. The cubic root of 64651742 is about 401.3532127093.

The spelling of 64651742 in words is "sixty-four million, six hundred fifty-one thousand, seven hundred forty-two".