64819627321892 has 24 divisors (see below), whose sum is σ = 114839004341376. Its totient is φ = 32008741575968.

The previous prime is 64819627321873. The next prime is 64819627321901. The reversal of 64819627321892 is 29812372691846.

It is a super-2 number, since 2×64819627321892² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31288763 + ... + 33296034.

It is an arithmetic number, because the mean of its divisors is an integer number (4784958514224).

Almost surely, 2^{64819627321892} is an apocalyptic number.

It is an amenable number.

64819627321892 is a deficient number, since it is larger than the sum of its proper divisors (50019377019484).

64819627321892 is a wasteful number, since it uses less digits than its factorization.

64819627321892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64587907 (or 64587905 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 68.

The spelling of 64819627321892 in words is "sixty-four trillion, eight hundred nineteen billion, six hundred twenty-seven million, three hundred twenty-one thousand, eight hundred ninety-two".