64519055493 has 32 divisors (see below), whose sum is σ = 91779072000. Its totient is φ = 40244008896.

The previous prime is 64519055453. The next prime is 64519055501. The reversal of 64519055493 is 39455091546.

It is not a de Polignac number, because 64519055493 - 2⁹ = 64519054981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64519055453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407208 + ... + 543006.

It is an arithmetic number, because the mean of its divisors is an integer number (2868096000).

Almost surely, 2^64519055493 is an apocalyptic number.

It is an amenable number.

64519055493 is a deficient number, since it is larger than the sum of its proper divisors (27260016507).

64519055493 is a wasteful number, since it uses less digits than its factorization.

64519055493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136001.

The product of its (nonzero) digits is 2916000, while the sum is 51.

The spelling of 64519055493 in words is "sixty-four billion, five hundred nineteen million, fifty-five thousand, four hundred ninety-three".