64881130 has 16 divisors (see below), whose sum is σ = 116881704. Its totient is φ = 25931200.

The previous prime is 64881121. The next prime is 64881133. The reversal of 64881130 is 3118846.

It can be written as a sum of positive squares in 4 ways, for example, as 53246209 + 11634921 = 7297^2 + 3411^2 .

It is a super-2 number, since 2×64881130² = 8419122060153800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64881092 and 64881101.

It is not an unprimeable number, because it can be changed into a prime (64881133) 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, 17304 + ... + 20716.

Almost surely, 2^64881130 is an apocalyptic number.

64881130 is a deficient number, since it is larger than the sum of its proper divisors (52000574).

64881130 is a wasteful number, since it uses less digits than its factorization.

64881130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 64881130 is about 8054.8823703391. The cubic root of 64881130 is about 401.8273269785.

Adding to 64881130 its reverse (3118846), we get a palindrome (67999976).

The spelling of 64881130 in words is "sixty-four million, eight hundred eighty-one thousand, one hundred thirty".