64513300978 has 16 divisors (see below), whose sum is σ = 112407251904. Its totient is φ = 27195302160.

The previous prime is 64513300933. The next prime is 64513300979. The reversal of 64513300978 is 87900331546.

It is not an unprimeable number, because it can be changed into a prime (64513300979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37770400 + ... + 37772107.

It is an arithmetic number, because the mean of its divisors is an integer number (7025453244).

Almost surely, 2^64513300978 is an apocalyptic number.

64513300978 is a deficient number, since it is larger than the sum of its proper divisors (47893950926).

64513300978 is a wasteful number, since it uses less digits than its factorization.

64513300978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75542577.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 64513300978 in words is "sixty-four billion, five hundred thirteen million, three hundred thousand, nine hundred seventy-eight".