1020256164 has 36 divisors (see below), whose sum is σ = 2580754176. Its totient is φ = 339851568.

The previous prime is 1020256123. The next prime is 1020256187. The reversal of 1020256164 is 4616520201.

1020256164 is a `hidden beast` number, since 1 + 0 + 20 + 25 + 616 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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, 48037 + ... + 65939.

It is an arithmetic number, because the mean of its divisors is an integer number (71687616).

Almost surely, 2^1020256164 is an apocalyptic number.

It is an amenable number.

1020256164 is an abundant number, since it is smaller than the sum of its proper divisors (1560498012).

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

1020256164 is a wasteful number, since it uses less digits than its factorization.

1020256164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19496 (or 19491 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1020256164 is about 31941.4489965624. The cubic root of 1020256164 is about 1006.7069706439.

Adding to 1020256164 its reverse (4616520201), we get a palindrome (5636776365).

It can be divided in two parts, 10202 and 56164, that added together give a palindrome (66366).

The spelling of 1020256164 in words is "one billion, twenty million, two hundred fifty-six thousand, one hundred sixty-four".