1263776379039 has 20 divisors (see below), whose sum is σ = 1948762305600. Its totient is φ = 815339597760.

The previous prime is 1263776379023. The next prime is 1263776379067. The reversal of 1263776379039 is 9309736773621.

It is not a de Polignac number, because 1263776379039 - 2⁴ = 1263776379023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263776389039) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 251645514 + ... + 251650535.

It is an arithmetic number, because the mean of its divisors is an integer number (97438115280).

Almost surely, 2^{1263776379039} is an apocalyptic number.

1263776379039 is a deficient number, since it is larger than the sum of its proper divisors (684985926561).

1263776379039 is an equidigital number, since it uses as much as digits as its factorization.

1263776379039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503296092 (or 503296083 counting only the distinct ones).

The product of its (nonzero) digits is 54010152, while the sum is 63.

The spelling of 1263776379039 in words is "one trillion, two hundred sixty-three billion, seven hundred seventy-six million, three hundred seventy-nine thousand, thirty-nine".