263351907240 has 64 divisors (see below), whose sum is σ = 790100524800. Its totient is φ = 70223192832.

The previous prime is 263351907233. The next prime is 263351907331. The reversal of 263351907240 is 42709153362.

It is a junction number, because it is equal to n+sod(n) for n = 263351907192 and 263351907201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2500689 + ... + 2603871.

It is an arithmetic number, because the mean of its divisors is an integer number (12345320700).

Almost surely, 2^263351907240 is an apocalyptic number.

263351907240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263351907240 is an abundant number, since it is smaller than the sum of its proper divisors (526748617560).

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

263351907240 is a wasteful number, since it uses less digits than its factorization.

263351907240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124466 (or 124462 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 263351907240 in words is "two hundred sixty-three billion, three hundred fifty-one million, nine hundred seven thousand, two hundred forty".