233561011640 has 64 divisors (see below), whose sum is σ = 587268753120. Its totient is φ = 82859776000.

The previous prime is 233561011633. The next prime is 233561011661. The reversal of 233561011640 is 46110165332.

It is a junction number, because it is equal to n+sod(n) for n = 233561011597 and 233561011606.

It is a congruent number.

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, 6455381 + ... + 6491460.

Almost surely, 2^233561011640 is an apocalyptic number.

233561011640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233561011640 is an abundant number, since it is smaller than the sum of its proper divisors (353707741480).

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

233561011640 is a wasteful number, since it uses less digits than its factorization.

233561011640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12946904 (or 12946900 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 233561011640 its reverse (46110165332), we get a palindrome (279671176972).

The spelling of 233561011640 in words is "two hundred thirty-three billion, five hundred sixty-one million, eleven thousand, six hundred forty".