64908625243644 has 1536 divisors, whose sum is σ = 235011538944000. Its totient is φ = 15007848210432.

The previous prime is 64908625243519. The next prime is 64908625243711. The reversal of 64908625243644 is 44634252680946.

64908625243644 is a `hidden beast` number, since 6 + 4 + 9 + 0 + 8 + 62 + 524 + 3 + 6 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 17965297182 + ... + 17965300794.

It is an arithmetic number, because the mean of its divisors is an integer number (153002304000).

Almost surely, 2^{64908625243644} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64908625243644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117505769472000).

64908625243644 is an abundant number, since it is smaller than the sum of its proper divisors (170102913700356).

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

64908625243644 is a wasteful number, since it uses less digits than its factorization.

64908625243644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824 (or 3816 counting only the distinct ones).

The product of its (nonzero) digits is 238878720, while the sum is 63.

The spelling of 64908625243644 in words is "sixty-four trillion, nine hundred eight billion, six hundred twenty-five million, two hundred forty-three thousand, six hundred forty-four".