235161663640 has 32 divisors (see below), whose sum is σ = 537787744560. Its totient is φ = 92522620800.

The previous prime is 235161663563. The next prime is 235161663677. The reversal of 235161663640 is 46366161532.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48186426 + ... + 48191305.

Almost surely, 2^235161663640 is an apocalyptic number.

235161663640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

235161663640 is an abundant number, since it is smaller than the sum of its proper divisors (302626080920).

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

235161663640 is a wasteful number, since it uses less digits than its factorization.

235161663640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96377803 (or 96377799 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 235161663640 in words is "two hundred thirty-five billion, one hundred sixty-one million, six hundred sixty-three thousand, six hundred forty".