256065545001 has 48 divisors (see below), whose sum is σ = 410107342848. Its totient is φ = 141557220000.

The previous prime is 256065544951. The next prime is 256065545003. The reversal of 256065545001 is 100545560652.

It is a happy number.

It is not a de Polignac number, because 256065545001 - 2⁶ = 256065544937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256065545003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17961126 + ... + 17975376.

It is an arithmetic number, because the mean of its divisors is an integer number (8543902976).

Almost surely, 2^256065545001 is an apocalyptic number.

256065545001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

256065545001 is a deficient number, since it is larger than the sum of its proper divisors (154041797847).

256065545001 is a wasteful number, since it uses less digits than its factorization.

256065545001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18242 (or 18235 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 256065545001 in words is "two hundred fifty-six billion, sixty-five million, five hundred forty-five thousand, one".