1263494377792 has 28 divisors (see below), whose sum is σ = 2593703440980. Its totient is φ = 609962802176.

The previous prime is 1263494377777. The next prime is 1263494377819. The reversal of 1263494377792 is 2977734943621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 520960594176 + 742533783616 = 721776^2 + 861704^2 .

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340379173 + ... + 340382884.

Almost surely, 2^{1263494377792} is an apocalyptic number.

It is an amenable number.

1263494377792 is an abundant number, since it is smaller than the sum of its proper divisors (1330209063188).

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

1263494377792 is an equidigital number, since it uses as much as digits as its factorization.

1263494377792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680762098 (or 680762088 counting only the distinct ones).

The product of its digits is 96018048, while the sum is 64.

The spelling of 1263494377792 in words is "one trillion, two hundred sixty-three billion, four hundred ninety-four million, three hundred seventy-seven thousand, seven hundred ninety-two".