1256064350064 has 80 divisors (see below), whose sum is σ = 3291371910144. Its totient is φ = 412686086400.

The previous prime is 1256064350053. The next prime is 1256064350081. The reversal of 1256064350064 is 4600534606521.

It is a junction number, because it is equal to n+sod(n) for n = 1256064349998 and 1256064350025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13965462 + ... + 14055114.

Almost surely, 2^{1256064350064} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256064350064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645685955072).

1256064350064 is an abundant number, since it is smaller than the sum of its proper divisors (2035307560080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256064350064 is a wasteful number, since it uses less digits than its factorization.

1256064350064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93846 (or 93840 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 1256064350064 its reverse (4600534606521), we get a palindrome (5856598956585).

The spelling of 1256064350064 in words is "one trillion, two hundred fifty-six billion, sixty-four million, three hundred fifty thousand, sixty-four".