256787787652 has 48 divisors (see below), whose sum is σ = 504042142464. Its totient is φ = 113454432000.

The previous prime is 256787787631. The next prime is 256787787673.

256787787652 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (256787787631) and next prime (256787787673).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226258 + ... + 751510.

It is an arithmetic number, because the mean of its divisors is an integer number (10500877968).

Almost surely, 2^256787787652 is an apocalyptic number.

256787787652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256787787652 is a deficient number, since it is larger than the sum of its proper divisors (247254354812).

256787787652 is a wasteful number, since it uses less digits than its factorization.

256787787652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525580 (or 525578 counting only the distinct ones).

The product of its digits is 553190400, while the sum is 70.

The spelling of 256787787652 in words is "two hundred fifty-six billion, seven hundred eighty-seven million, seven hundred eighty-seven thousand, six hundred fifty-two".