64188742 has 4 divisors (see below), whose sum is σ = 96283116. Its totient is φ = 32094370.

The previous prime is 64188713. The next prime is 64188749. The reversal of 64188742 is 24788146.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 64188695 and 64188704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64188749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16047184 + ... + 16047187.

It is an arithmetic number, because the mean of its divisors is an integer number (24070779).

Almost surely, 2^64188742 is an apocalyptic number.

64188742 is a deficient number, since it is larger than the sum of its proper divisors (32094374).

64188742 is a wasteful number, since it uses less digits than its factorization.

64188742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32094373.

The product of its digits is 86016, while the sum is 40.

The square root of 64188742 is about 8011.7876906468. The cubic root of 64188742 is about 400.3928265919.

The spelling of 64188742 in words is "sixty-four million, one hundred eighty-eight thousand, seven hundred forty-two".