64069155 has 12 divisors (see below), whose sum is σ = 111053280. Its totient is φ = 34170192.

The previous prime is 64069153. The next prime is 64069169. The reversal of 64069155 is 55196046.

64069155 is a `hidden beast` number, since 640 + 6 + 9 + 1 + 5 + 5 = 666.

It is not a de Polignac number, because 64069155 - 2¹ = 64069153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64069153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 711835 + ... + 711924.

It is an arithmetic number, because the mean of its divisors is an integer number (9254440).

Almost surely, 2^64069155 is an apocalyptic number.

64069155 is a deficient number, since it is larger than the sum of its proper divisors (46984125).

64069155 is a wasteful number, since it uses less digits than its factorization.

64069155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423770 (or 1423767 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 64069155 is about 8004.3210205488. The cubic root of 64069155 is about 400.1440210553.

The spelling of 64069155 in words is "sixty-four million, sixty-nine thousand, one hundred fifty-five".