64645477454646 has 96 divisors (see below), whose sum is σ = 155981480073120. Its totient is φ = 19184256345600.

The previous prime is 64645477454641. The next prime is 64645477454737.

64645477454646 is a `hidden beast` number, since 6 + 4 + 6 + 4 + 5 + 4 + 7 + 74 + 546 + 4 + 6 = 666.

64645477454646 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64645477454641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8920455 + ... + 14452178.

It is an arithmetic number, because the mean of its divisors is an integer number (1624807084095).

Almost surely, 2^{64645477454646} is an apocalyptic number.

64645477454646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64645477454646 is an abundant number, since it is smaller than the sum of its proper divisors (91336002618474).

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

64645477454646 is a wasteful number, since it uses less digits than its factorization.

64645477454646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23372942 (or 23372939 counting only the distinct ones).

The product of its digits is 6502809600, while the sum is 72.

The spelling of 64645477454646 in words is "sixty-four trillion, six hundred forty-five billion, four hundred seventy-seven million, four hundred fifty-four thousand, six hundred forty-six".