64540345 has 8 divisors (see below), whose sum is σ = 77942664. Its totient is φ = 51302784.

The previous prime is 64540337. The next prime is 64540351. The reversal of 64540345 is 54304546.

It can be written as a sum of positive squares in 4 ways, for example, as 284089 + 64256256 = 533^2 + 8016^2 .

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 64540345 - 2³ = 64540337 is a prime.

It is a super-2 number, since 2×64540345² = 8330912265438050, 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, 40324 + ... + 41893.

It is an arithmetic number, because the mean of its divisors is an integer number (9742833).

Almost surely, 2^64540345 is an apocalyptic number.

It is an amenable number.

64540345 is a deficient number, since it is larger than the sum of its proper divisors (13402319).

64540345 is a wasteful number, since it uses less digits than its factorization.

64540345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82379.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 64540345 is about 8033.7005794341. The cubic root of 64540345 is about 401.1225654201.

The spelling of 64540345 in words is "sixty-four million, five hundred forty thousand, three hundred forty-five".