263924978940 has 480 divisors, whose sum is σ = 962895064320. Its totient is φ = 60011280000.

The previous prime is 263924978921. The next prime is 263924978953. The reversal of 263924978940 is 49879429362.

263924978940 is a `hidden beast` number, since 2 + 63 + 9 + 2 + 497 + 89 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 325431135 + ... + 325431945.

It is an arithmetic number, because the mean of its divisors is an integer number (2006031384).

Almost surely, 2^263924978940 is an apocalyptic number.

263924978940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263924978940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481447532160).

263924978940 is an abundant number, since it is smaller than the sum of its proper divisors (698970085380).

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

263924978940 is a wasteful number, since it uses less digits than its factorization.

263924978940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 263924978940 in words is "two hundred sixty-three billion, nine hundred twenty-four million, nine hundred seventy-eight thousand, nine hundred forty".