64155193 has 4 divisors (see below), whose sum is σ = 64660480. Its totient is φ = 63649908.

The previous prime is 64155173. The next prime is 64155209. The reversal of 64155193 is 39155146.

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.

It is a cyclic number.

It is not a de Polignac number, because 64155193 - 2²⁵ = 30600761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64155173) 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, 252453 + ... + 252706.

It is an arithmetic number, because the mean of its divisors is an integer number (16165120).

Almost surely, 2^64155193 is an apocalyptic number.

It is an amenable number.

64155193 is a deficient number, since it is larger than the sum of its proper divisors (505287).

64155193 is a wasteful number, since it uses less digits than its factorization.

64155193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505286.

The product of its digits is 16200, while the sum is 34.

The square root of 64155193 is about 8009.6936895240. The cubic root of 64155193 is about 400.3230577640.

The spelling of 64155193 in words is "sixty-four million, one hundred fifty-five thousand, one hundred ninety-three".