64112980 has 24 divisors (see below), whose sum is σ = 136484712. Its totient is φ = 25293312.

The previous prime is 64112977. The next prime is 64112981. The reversal of 64112980 is 8921146.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14607684 + 49505296 = 3822^2 + 7036^2 .

It is a super-2 number, since 2×64112980² = 8220948408960800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64112981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20497 + ... + 23416.

It is an arithmetic number, because the mean of its divisors is an integer number (5686863).

Almost surely, 2^64112980 is an apocalyptic number.

It is an amenable number.

64112980 is an abundant number, since it is smaller than the sum of its proper divisors (72371732).

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

64112980 is a wasteful number, since it uses less digits than its factorization.

64112980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43995 (or 43993 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 64112980 is about 8007.0581364194. The cubic root of 64112980 is about 400.2352366322.

The spelling of 64112980 in words is "sixty-four million, one hundred twelve thousand, nine hundred eighty".