64121016 has 32 divisors (see below), whose sum is σ = 160617600. Its totient is φ = 21331680.

The previous prime is 64121011. The next prime is 64121021. The reversal of 64121016 is 61012146.

64121016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64121011) and next prime (64121021).

It is a super-2 number, since 2×64121016² = 8223009385744512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64120983 and 64121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11365 + ... + 16043.

It is an arithmetic number, because the mean of its divisors is an integer number (5019300).

Almost surely, 2^64121016 is an apocalyptic number.

It is an amenable number.

64121016 is an abundant number, since it is smaller than the sum of its proper divisors (96496584).

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

64121016 is a wasteful number, since it uses less digits than its factorization.

64121016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5259 (or 5255 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 64121016 is about 8007.5599279681. The cubic root of 64121016 is about 400.2519579264.

The spelling of 64121016 in words is "sixty-four million, one hundred twenty-one thousand, sixteen".