64145755 has 8 divisors (see below), whose sum is σ = 77021712. Its totient is φ = 51285408.

The previous prime is 64145749. The next prime is 64145773. The reversal of 64145755 is 55754146.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64145755 - 2³ = 64145747 is a prime.

It is a super-2 number, since 2×64145755² = 8229355769040050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9064 + ... + 14506.

It is an arithmetic number, because the mean of its divisors is an integer number (9627714).

Almost surely, 2^64145755 is an apocalyptic number.

64145755 is a deficient number, since it is larger than the sum of its proper divisors (12875957).

64145755 is a wasteful number, since it uses less digits than its factorization.

64145755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7805.

The product of its digits is 84000, while the sum is 37.

The square root of 64145755 is about 8009.1045067473. The cubic root of 64145755 is about 400.3034260234.

The spelling of 64145755 in words is "sixty-four million, one hundred forty-five thousand, seven hundred fifty-five".