64949166555 has 288 divisors, whose sum is σ = 137276633088. Its totient is φ = 26103168000.

The previous prime is 64949166487. The next prime is 64949166559. The reversal of 64949166555 is 55566194946.

It is not a de Polignac number, because 64949166555 - 2¹² = 64949162459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64949166559) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 388917082 + ... + 388917248.

It is an arithmetic number, because the mean of its divisors is an integer number (476654976).

Almost surely, 2^64949166555 is an apocalyptic number.

64949166555 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64949166555 is an abundant number, since it is smaller than the sum of its proper divisors (72327466533).

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

64949166555 is a wasteful number, since it uses less digits than its factorization.

64949166555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 327 counting only the distinct ones).

The product of its digits is 34992000, while the sum is 60.

The spelling of 64949166555 in words is "sixty-four billion, nine hundred forty-nine million, one hundred sixty-six thousand, five hundred fifty-five".