64155266690 has 32 divisors (see below), whose sum is σ = 117969151680. Its totient is φ = 25111404864.

The previous prime is 64155266627. The next prime is 64155266713. The reversal of 64155266690 is 9666255146.

It is a super-2 number, since 2×64155266690² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41177 + ... + 360563.

It is an arithmetic number, because the mean of its divisors is an integer number (3686535990).

Almost surely, 2^64155266690 is an apocalyptic number.

64155266690 is a deficient number, since it is larger than the sum of its proper divisors (53813884990).

64155266690 is a wasteful number, since it uses less digits than its factorization.

64155266690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319826.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 64155266690 in words is "sixty-four billion, one hundred fifty-five million, two hundred sixty-six thousand, six hundred ninety".