1263121862880 has 192 divisors, whose sum is σ = 4032601251840. Its totient is φ = 332310472704.

The previous prime is 1263121862869. The next prime is 1263121862909. The reversal of 1263121862880 is 882681213621.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 10853962 + ... + 10969718.

It is an arithmetic number, because the mean of its divisors is an integer number (21003131520).

Almost surely, 2^{1263121862880} is an apocalyptic number.

1263121862880 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 1263121862880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2016300625920).

1263121862880 is an abundant number, since it is smaller than the sum of its proper divisors (2769479388960).

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

1263121862880 is a wasteful number, since it uses less digits than its factorization.

1263121862880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116081 (or 116073 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 1263121862880 in words is "one trillion, two hundred sixty-three billion, one hundred twenty-one million, eight hundred sixty-two thousand, eight hundred eighty".