263938064533 has 32 divisors (see below), whose sum is σ = 313804229760. Its totient is φ = 218842940160.

The previous prime is 263938064527. The next prime is 263938064557. The reversal of 263938064533 is 335460839362.

It is not a de Polignac number, because 263938064533 - 2⁹ = 263938064021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263938064513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3985891 + ... + 4051567.

It is an arithmetic number, because the mean of its divisors is an integer number (9806382180).

Almost surely, 2^263938064533 is an apocalyptic number.

It is an amenable number.

263938064533 is a deficient number, since it is larger than the sum of its proper divisors (49866165227).

263938064533 is a wasteful number, since it uses less digits than its factorization.

263938064533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66037.

The product of its (nonzero) digits is 8398080, while the sum is 52.

The spelling of 263938064533 in words is "two hundred sixty-three billion, nine hundred thirty-eight million, sixty-four thousand, five hundred thirty-three".