256035115020 has 48 divisors (see below), whose sum is σ = 716965417728. Its totient is φ = 68269640640.

The previous prime is 256035115003. The next prime is 256035115079. The reversal of 256035115020 is 20511530652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465025 + ... + 853415.

It is an arithmetic number, because the mean of its divisors is an integer number (14936779536).

Almost surely, 2^256035115020 is an apocalyptic number.

256035115020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256035115020 is an abundant number, since it is smaller than the sum of its proper divisors (460930302708).

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

256035115020 is a wasteful number, since it uses less digits than its factorization.

256035115020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399390 (or 399388 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 256035115020 its reverse (20511530652), we get a palindrome (276546645672).

The spelling of 256035115020 in words is "two hundred fifty-six billion, thirty-five million, one hundred fifteen thousand, twenty".