1263802890378 has 48 divisors (see below), whose sum is σ = 2953229026464. Its totient is φ = 359495831520.

The previous prime is 1263802890373. The next prime is 1263802890433. The reversal of 1263802890378 is 8730982083621.

It is not an unprimeable number, because it can be changed into a prime (1263802890373) 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, 9401653 + ... + 9535128.

It is an arithmetic number, because the mean of its divisors is an integer number (61525604718).

Almost surely, 2^{1263802890378} is an apocalyptic number.

1263802890378 is an abundant number, since it is smaller than the sum of its proper divisors (1689426136086).

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

1263802890378 is a wasteful number, since it uses less digits than its factorization.

1263802890378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18937027 (or 18937020 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 1263802890378 in words is "one trillion, two hundred sixty-three billion, eight hundred two million, eight hundred ninety thousand, three hundred seventy-eight".