64199539273644 has 36 divisors (see below), whose sum is σ = 162479832824400. Its totient is φ = 21373780828320.

The previous prime is 64199539273633. The next prime is 64199539273663. The reversal of 64199539273644 is 44637293599146.

64199539273644 is a `hidden beast` number, since 6 + 4 + 1 + 9 + 9 + 539 + 27 + 3 + 64 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×64199539273644² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1086036544 + ... + 1086095655.

Almost surely, 2^{64199539273644} is an apocalyptic number.

It is an amenable number.

64199539273644 is an abundant number, since it is smaller than the sum of its proper divisors (98280293550756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64199539273644 is a wasteful number, since it uses less digits than its factorization.

64199539273644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172133030 (or 2172133025 counting only the distinct ones).

The product of its digits is 1058158080, while the sum is 72.

The spelling of 64199539273644 in words is "sixty-four trillion, one hundred ninety-nine billion, five hundred thirty-nine million, two hundred seventy-three thousand, six hundred forty-four".