256540220034 has 32 divisors (see below), whose sum is σ = 589415890560. Its totient is φ = 72917425152.

The previous prime is 256540220023. The next prime is 256540220059. The reversal of 256540220034 is 430022045652.

It is a happy number.

It is a super-2 number, since 2×256540220034² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256540219977 and 256540220004.

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, 15815989 + ... + 15832200.

It is an arithmetic number, because the mean of its divisors is an integer number (18419246580).

Almost surely, 2^256540220034 is an apocalyptic number.

256540220034 is an abundant number, since it is smaller than the sum of its proper divisors (332875670526).

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

256540220034 is a wasteful number, since it uses less digits than its factorization.

256540220034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31648394.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 256540220034 its reverse (430022045652), we get a palindrome (686562265686).

The spelling of 256540220034 in words is "two hundred fifty-six billion, five hundred forty million, two hundred twenty thousand, thirty-four".