1263029122256 has 160 divisors (see below), whose sum is σ = 2744481484800. Its totient is φ = 558173744640.

The previous prime is 1263029122219. The next prime is 1263029122279. The reversal of 1263029122256 is 6522219203621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1027687850 + ... + 1027689078.

It is an arithmetic number, because the mean of its divisors is an integer number (17153009280).

Almost surely, 2^{1263029122256} is an apocalyptic number.

1263029122256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263029122256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372240742400).

1263029122256 is an abundant number, since it is smaller than the sum of its proper divisors (1481452362544).

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

1263029122256 is a wasteful number, since it uses less digits than its factorization.

1263029122256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017 (or 2011 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 1263029122256 in words is "one trillion, two hundred sixty-three billion, twenty-nine million, one hundred twenty-two thousand, two hundred fifty-six".