64767970618 has 16 divisors (see below), whose sum is σ = 104641618536. Its totient is φ = 29888213760.

The previous prime is 64767970607. The next prime is 64767970633. The reversal of 64767970618 is 81607976746.

It can be written as a sum of positive squares in 4 ways, for example, as 54930703129 + 9837267489 = 234373^2 + 99183^2 .

It is a super-2 number, since 2×64767970618² (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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24123 + ... + 360718.

Almost surely, 2^64767970618 is an apocalyptic number.

64767970618 is a deficient number, since it is larger than the sum of its proper divisors (39873647918).

64767970618 is a wasteful number, since it uses less digits than its factorization.

64767970618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391329.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 64767970618 in words is "sixty-four billion, seven hundred sixty-seven million, nine hundred seventy thousand, six hundred eighteen".