263205770340 has 24 divisors (see below), whose sum is σ = 736976157120. Its totient is φ = 70188205408.

The previous prime is 263205770323. The next prime is 263205770369. The reversal of 263205770340 is 43077502362.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2193381360 + ... + 2193381479.

It is an arithmetic number, because the mean of its divisors is an integer number (30707339880).

Almost surely, 2^263205770340 is an apocalyptic number.

263205770340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263205770340 is an abundant number, since it is smaller than the sum of its proper divisors (473770386780).

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

263205770340 is a wasteful number, since it uses less digits than its factorization.

263205770340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386762851 (or 4386762849 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 39.

The spelling of 263205770340 in words is "two hundred sixty-three billion, two hundred five million, seven hundred seventy thousand, three hundred forty".