256673654 has 4 divisors (see below), whose sum is σ = 385010484. Its totient is φ = 128336826.

The previous prime is 256673611. The next prime is 256673657. The reversal of 256673654 is 456376652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256673657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64168412 + ... + 64168415.

It is an arithmetic number, because the mean of its divisors is an integer number (96252621).

Almost surely, 2^256673654 is an apocalyptic number.

256673654 is a deficient number, since it is larger than the sum of its proper divisors (128336830).

256673654 is a wasteful number, since it uses less digits than its factorization.

256673654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128336829.

The product of its digits is 907200, while the sum is 44.

The square root of 256673654 is about 16021.0378565185. The cubic root of 256673654 is about 635.5168908107.

The spelling of 256673654 in words is "two hundred fifty-six million, six hundred seventy-three thousand, six hundred fifty-four".