1263444211400 has 144 divisors (see below), whose sum is σ = 3377479214400. Its totient is φ = 430573668480.

The previous prime is 1263444211399. The next prime is 1263444211409. The reversal of 1263444211400 is 41124443621.

It is not an unprimeable number, because it can be changed into a prime (1263444211409) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 39028421 + ... + 39060779.

Almost surely, 2^{1263444211400} is an apocalyptic number.

1263444211400 is a gapful number since it is divisible by the number (10) 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 1263444211400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1688739607200).

1263444211400 is an abundant number, since it is smaller than the sum of its proper divisors (2114035003000).

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

1263444211400 is a wasteful number, since it uses less digits than its factorization.

1263444211400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32716 (or 32540 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 1263444211400 in words is "one trillion, two hundred sixty-three billion, four hundred forty-four million, two hundred eleven thousand, four hundred".