64853557 has 4 divisors (see below), whose sum is σ = 64888000. Its totient is φ = 64819116.

The previous prime is 64853531. The next prime is 64853573. The reversal of 64853557 is 75535846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75535846 = 2 ⋅37767923.

It is a cyclic number.

It is not a de Polignac number, because 64853557 - 2²³ = 56464949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64853507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14223 + ... + 18220.

It is an arithmetic number, because the mean of its divisors is an integer number (16222000).

Almost surely, 2^64853557 is an apocalyptic number.

It is an amenable number.

64853557 is a deficient number, since it is larger than the sum of its proper divisors (34443).

64853557 is a wasteful number, since it uses less digits than its factorization.

64853557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34442.

The product of its digits is 504000, while the sum is 43.

The square root of 64853557 is about 8053.1706178374. The cubic root of 64853557 is about 401.7703964309.

The spelling of 64853557 in words is "sixty-four million, eight hundred fifty-three thousand, five hundred fifty-seven".