1263958340290 has 8 divisors (see below), whose sum is σ = 2275125012540. Its totient is φ = 505583336112.

The previous prime is 1263958340273. The next prime is 1263958340321. The reversal of 1263958340290 is 920438593621.

It can be written as a sum of positive squares in 2 ways, for example, as 1263958299081 + 41209 = 1124259^2 + 203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63197917005 + ... + 63197917024.

Almost surely, 2^{1263958340290} is an apocalyptic number.

1263958340290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1263958340290 is a deficient number, since it is larger than the sum of its proper divisors (1011166672250).

1263958340290 is a wasteful number, since it uses less digits than its factorization.

1263958340290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126395834036.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 1263958340290 in words is "one trillion, two hundred sixty-three billion, nine hundred fifty-eight million, three hundred forty thousand, two hundred ninety".