64855155490 has 32 divisors (see below), whose sum is σ = 123307531776. Its totient is φ = 24521374080.

The previous prime is 64855155479. The next prime is 64855155493. The reversal of 64855155490 is 9455155846.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (64855155493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2419347 + ... + 2446006.

It is an arithmetic number, because the mean of its divisors is an integer number (3853360368).

Almost surely, 2^64855155490 is an apocalyptic number.

64855155490 is a deficient number, since it is larger than the sum of its proper divisors (58452376286).

64855155490 is a wasteful number, since it uses less digits than its factorization.

64855155490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865434.

The product of its (nonzero) digits is 4320000, while the sum is 52.

The spelling of 64855155490 in words is "sixty-four billion, eight hundred fifty-five million, one hundred fifty-five thousand, four hundred ninety".