1263780382550 has 48 divisors (see below), whose sum is σ = 2691777215232. Its totient is φ = 432434647200.

The previous prime is 1263780382547. The next prime is 1263780382559. The reversal of 1263780382550 is 552830873621.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263780382559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3413216 + ... + 3765315.

It is an arithmetic number, because the mean of its divisors is an integer number (56078691984).

Almost surely, 2^{1263780382550} is an apocalyptic number.

1263780382550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1263780382550 is an abundant number, since it is smaller than the sum of its proper divisors (1427996832682).

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

1263780382550 is a wasteful number, since it uses less digits than its factorization.

1263780382550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179053 (or 7179048 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 1263780382550 in words is "one trillion, two hundred sixty-three billion, seven hundred eighty million, three hundred eighty-two thousand, five hundred fifty".