1263900277523 has 48 divisors (see below), whose sum is σ = 1392067537056. Its totient is φ = 1146907008000.

The previous prime is 1263900277429. The next prime is 1263900277529. The reversal of 1263900277523 is 3257720093621.

It is not a de Polignac number, because 1263900277523 - 2¹⁴ = 1263900261139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263900277529) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1152141911 + ... + 1152143007.

It is an arithmetic number, because the mean of its divisors is an integer number (29001407022).

Almost surely, 2^{1263900277523} is an apocalyptic number.

1263900277523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1263900277523 is a deficient number, since it is larger than the sum of its proper divisors (128167259533).

1263900277523 is a wasteful number, since it uses less digits than its factorization.

1263900277523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 1263900277523 in words is "one trillion, two hundred sixty-three billion, nine hundred million, two hundred seventy-seven thousand, five hundred twenty-three".