263315407878 has 32 divisors (see below), whose sum is σ = 585718583520. Its totient is φ = 87685817760.

The previous prime is 263315407877. The next prime is 263315407903. The reversal of 263315407878 is 878704513362.

It is a happy number.

263315407878 is a `hidden beast` number, since 2 + 63 + 31 + 540 + 7 + 8 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263315407877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2332825 + ... + 2443092.

It is an arithmetic number, because the mean of its divisors is an integer number (18303705735).

Almost surely, 2^263315407878 is an apocalyptic number.

263315407878 is an abundant number, since it is smaller than the sum of its proper divisors (322403175642).

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

263315407878 is a wasteful number, since it uses less digits than its factorization.

263315407878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776949 (or 4776943 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 263315407878 in words is "two hundred sixty-three billion, three hundred fifteen million, four hundred seven thousand, eight hundred seventy-eight".