256622402323154 has 12 divisors (see below), whose sum is σ = 447779906094654. Its totient is φ = 109981029567024.

The previous prime is 256622402323129. The next prime is 256622402323223. The reversal of 256622402323154 is 451323204226652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 145962038175625 + 110660364147529 = 12081475^2 + 10519523^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256622402323099 and 256622402323108.

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 5 ways as a sum of consecutive naturals, for example, 1309297970939 + ... + 1309297971134.

Almost surely, 2^{256622402323154} is an apocalyptic number.

256622402323154 is a deficient number, since it is larger than the sum of its proper divisors (191157503771500).

256622402323154 is a wasteful number, since it uses less digits than its factorization.

256622402323154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618595942089 (or 2618595942082 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 256622402323154 in words is "two hundred fifty-six trillion, six hundred twenty-two billion, four hundred two million, three hundred twenty-three thousand, one hundred fifty-four".