1263876387575 has 6 divisors (see below), whose sum is σ = 1567206720624. Its totient is φ = 1011101110040.

The previous prime is 1263876387563. The next prime is 1263876387617. The reversal of 1263876387575 is 5757836783621.

It is not a de Polignac number, because 1263876387575 - 2²² = 1263872193271 is a prime.

It is a super-2 number, since 2×1263876387575² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25277527727 + ... + 25277527776.

It is an arithmetic number, because the mean of its divisors is an integer number (261201120104).

Almost surely, 2^{1263876387575} is an apocalyptic number.

1263876387575 is a deficient number, since it is larger than the sum of its proper divisors (303330333049).

1263876387575 is an equidigital number, since it uses as much as digits as its factorization.

1263876387575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50555055513 (or 50555055508 counting only the distinct ones).

The product of its digits is 355622400, while the sum is 68.

The spelling of 1263876387575 in words is "one trillion, two hundred sixty-three billion, eight hundred seventy-six million, three hundred eighty-seven thousand, five hundred seventy-five".