64155330681 has 16 divisors (see below), whose sum is σ = 92135077440. Its totient is φ = 39473945280.

The previous prime is 64155330671. The next prime is 64155330763. The reversal of 64155330681 is 18603355146.

It is not a de Polignac number, because 64155330681 - 2¹³ = 64155322489 is a prime.

It is a super-2 number, since 2×64155330681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64155330611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125146 + ... + 379436.

It is an arithmetic number, because the mean of its divisors is an integer number (5758442340).

Almost surely, 2^64155330681 is an apocalyptic number.

It is an amenable number.

64155330681 is a deficient number, since it is larger than the sum of its proper divisors (27979746759).

64155330681 is a wasteful number, since it uses less digits than its factorization.

64155330681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260776.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 64155330681 in words is "sixty-four billion, one hundred fifty-five million, three hundred thirty thousand, six hundred eighty-one".