64111020 has 24 divisors (see below), whose sum is σ = 179511024. Its totient is φ = 17096256.

The previous prime is 64111013. The next prime is 64111043. The reversal of 64111020 is 2011146.

It is a super-2 number, since 2×64111020² = 8220445770880800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534199 + ... + 534318.

It is an arithmetic number, because the mean of its divisors is an integer number (7479626).

Almost surely, 2^64111020 is an apocalyptic number.

64111020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64111020 is an abundant number, since it is smaller than the sum of its proper divisors (115400004).

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

64111020 is a wasteful number, since it uses less digits than its factorization.

64111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068529 (or 1068527 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 64111020 is about 8006.9357434664. The cubic root of 64111020 is about 400.2311580558.

Adding to 64111020 its reverse (2011146), we get a palindrome (66122166).

The spelling of 64111020 in words is "sixty-four million, one hundred eleven thousand, twenty".