64570849 has 16 divisors (see below), whose sum is σ = 76809600. Its totient is φ = 53109504.

The previous prime is 64570823. The next prime is 64570871. The reversal of 64570849 is 94807546.

It is not a de Polignac number, because 64570849 - 2¹⁵ = 64538081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64570819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35449 + ... + 37225.

It is an arithmetic number, because the mean of its divisors is an integer number (4800600).

Almost surely, 2^64570849 is an apocalyptic number.

It is an amenable number.

64570849 is a deficient number, since it is larger than the sum of its proper divisors (12238751).

64570849 is a wasteful number, since it uses less digits than its factorization.

64570849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 64570849 is about 8035.5988575837. The cubic root of 64570849 is about 401.1857502675.

The spelling of 64570849 in words is "sixty-four million, five hundred seventy thousand, eight hundred forty-nine".