1263623368490 has 48 divisors (see below), whose sum is σ = 2646379040904. Its totient is φ = 433159372800.

The previous prime is 1263623368453. The next prime is 1263623368493. The reversal of 1263623368490 is 948633263621.

It can be written as a sum of positive squares in 4 ways, for example, as 962280559681 + 301342808809 = 980959^2 + 548947^2 .

It is not an unprimeable number, because it can be changed into a prime (1263623368493) 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, 2343530 + ... + 2831850.

Almost surely, 2^{1263623368490} is an apocalyptic number.

1263623368490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1263623368490 is an abundant number, since it is smaller than the sum of its proper divisors (1382755672414).

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

1263623368490 is a wasteful number, since it uses less digits than its factorization.

1263623368490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493623 (or 493616 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 53.

The spelling of 1263623368490 in words is "one trillion, two hundred sixty-three billion, six hundred twenty-three million, three hundred sixty-eight thousand, four hundred ninety".