64121670180 has 72 divisors (see below), whose sum is σ = 194526101952. Its totient is φ = 17097028416.

The previous prime is 64121670131. The next prime is 64121670187. The reversal of 64121670180 is 8107612146.

It is a happy number.

64121670180 is a `hidden beast` number, since 6 + 412 + 1 + 67 + 0 + 180 = 666.

It is a super-2 number, since 2×64121670180² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64121670187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1961449 + ... + 1993871.

It is an arithmetic number, because the mean of its divisors is an integer number (2701751416).

Almost surely, 2^64121670180 is an apocalyptic number.

64121670180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64121670180 is an abundant number, since it is smaller than the sum of its proper divisors (130404431772).

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

64121670180 is a wasteful number, since it uses less digits than its factorization.

64121670180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43425 (or 43420 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 64121670180 in words is "sixty-four billion, one hundred twenty-one million, six hundred seventy thousand, one hundred eighty".