1263780117949 has 16 divisors (see below), whose sum is σ = 1317739970560. Its totient is φ = 1210654324080.

The previous prime is 1263780117947. The next prime is 1263780117959. The reversal of 1263780117949 is 9497110873621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1263780117949 - 2¹ = 1263780117947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263780117893 and 1263780117902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263780117947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8029084 + ... + 8184970.

It is an arithmetic number, because the mean of its divisors is an integer number (82358748160).

Almost surely, 2^{1263780117949} is an apocalyptic number.

It is an amenable number.

1263780117949 is a deficient number, since it is larger than the sum of its proper divisors (53959852611).

1263780117949 is a wasteful number, since it uses less digits than its factorization.

1263780117949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158560.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 1263780117949 in words is "one trillion, two hundred sixty-three billion, seven hundred eighty million, one hundred seventeen thousand, nine hundred forty-nine".