64157746 has 4 divisors (see below), whose sum is σ = 96236622. Its totient is φ = 32078872.

The previous prime is 64157713. The next prime is 64157747. The reversal of 64157746 is 64775146.

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

It can be written as a sum of positive squares in only one way, i.e., 56927025 + 7230721 = 7545^2 + 2689^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 64157699 and 64157708.

It is not an unprimeable number, because it can be changed into a prime (64157747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16039435 + ... + 16039438.

Almost surely, 2^64157746 is an apocalyptic number.

64157746 is a deficient number, since it is larger than the sum of its proper divisors (32078876).

64157746 is a wasteful number, since it uses less digits than its factorization.

64157746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32078875.

The product of its digits is 141120, while the sum is 40.

The square root of 64157746 is about 8009.8530573288. The cubic root of 64157746 is about 400.3283678626.

It can be divided in two parts, 6415 and 7746, that added together give a square (14161 = 119²).

The spelling of 64157746 in words is "sixty-four million, one hundred fifty-seven thousand, seven hundred forty-six".