64156945 has 8 divisors (see below), whose sum is σ = 77109120. Its totient is φ = 51245040.

The previous prime is 64156943. The next prime is 64156957. The reversal of 64156945 is 54965146.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64156945 - 2¹ = 64156943 is a prime.

It is a super-2 number, since 2×64156945² = 8232227183466050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64156898 and 64156907.

It is not an unprimeable number, because it can be changed into a prime (64156943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6441 + ... + 13030.

It is an arithmetic number, because the mean of its divisors is an integer number (9638640).

Almost surely, 2^64156945 is an apocalyptic number.

It is an amenable number.

64156945 is a deficient number, since it is larger than the sum of its proper divisors (12952175).

64156945 is a wasteful number, since it uses less digits than its factorization.

64156945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20135.

The product of its digits is 129600, while the sum is 40.

The square root of 64156945 is about 8009.8030562555. The cubic root of 64156945 is about 400.3267018421.

The spelling of 64156945 in words is "sixty-four million, one hundred fifty-six thousand, nine hundred forty-five".