64519976930 has 16 divisors (see below), whose sum is σ = 116147396664. Its totient is φ = 25805448960.

The previous prime is 64519976923. The next prime is 64519976933. The reversal of 64519976930 is 3967991546.

It can be written as a sum of positive squares in 4 ways, for example, as 39492420529 + 25027556401 = 198727^2 + 158201^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64519976930.

It is not an unprimeable number, because it can be changed into a prime (64519976933) 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, 209357 + ... + 415776.

Almost surely, 2^64519976930 is an apocalyptic number.

64519976930 is a deficient number, since it is larger than the sum of its proper divisors (51627419734).

64519976930 is a wasteful number, since it uses less digits than its factorization.

64519976930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635461.

The product of its (nonzero) digits is 11022480, while the sum is 59.

The spelling of 64519976930 in words is "sixty-four billion, five hundred nineteen million, nine hundred seventy-six thousand, nine hundred thirty".