64145880 has 48 divisors (see below), whose sum is σ = 208475280. Its totient is φ = 17105472.

The previous prime is 64145863. The next prime is 64145933. The reversal of 64145880 is 8854146.

64145880 is a `hidden beast` number, since 64 + 14 + 588 + 0 = 666.

It is a super-2 number, since 2×64145880² = 8229387841948800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88732 + ... + 89451.

It is an arithmetic number, because the mean of its divisors is an integer number (4343235).

Almost surely, 2^64145880 is an apocalyptic number.

64145880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64145880 is an abundant number, since it is smaller than the sum of its proper divisors (144329400).

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

64145880 is a wasteful number, since it uses less digits than its factorization.

64145880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178200 (or 178193 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 64145880 is about 8009.1123103625. The cubic root of 64145880 is about 400.3036860453.

It can be divided in two parts, 64145 and 880, that added together give a square (65025 = 255²).

The spelling of 64145880 in words is "sixty-four million, one hundred forty-five thousand, eight hundred eighty".