64155049 has 4 divisors (see below), whose sum is σ = 73320064. Its totient is φ = 54990036.

The previous prime is 64155019. The next prime is 64155061. The reversal of 64155049 is 94055146.

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: 94055146 = 2 ⋅47027573.

It is a cyclic number.

It is not a de Polignac number, because 64155049 - 2⁷ = 64154921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64155019) 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, 4582497 + ... + 4582510.

It is an arithmetic number, because the mean of its divisors is an integer number (18330016).

Almost surely, 2^64155049 is an apocalyptic number.

It is an amenable number.

64155049 is a deficient number, since it is larger than the sum of its proper divisors (9165015).

64155049 is an equidigital number, since it uses as much as digits as its factorization.

64155049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9165014.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 64155049 is about 8009.6847004111. The cubic root of 64155049 is about 400.3227582477.

The spelling of 64155049 in words is "sixty-four million, one hundred fifty-five thousand, forty-nine".