256049469490 has 16 divisors (see below), whose sum is σ = 480927699648. Its totient is φ = 97966753456.

The previous prime is 256049469469. The next prime is 256049469499. The reversal of 256049469490 is 94964940652.

It is a happy number.

It is a super-2 number, since 2×256049469490² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256049469499) 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, 556629052 + ... + 556629511.

It is an arithmetic number, because the mean of its divisors is an integer number (30057981228).

Almost surely, 2^256049469490 is an apocalyptic number.

256049469490 is a deficient number, since it is larger than the sum of its proper divisors (224878230158).

256049469490 is a wasteful number, since it uses less digits than its factorization.

256049469490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113258593.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 256049469490 in words is "two hundred fifty-six billion, forty-nine million, four hundred sixty-nine thousand, four hundred ninety".