53681656 has 24 divisors (see below), whose sum is σ = 117087120. Its totient is φ = 23006256.

The previous prime is 53681653. The next prime is 53681657. The reversal of 53681656 is 65618635.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53681651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68080 + ... + 68863.

It is an arithmetic number, because the mean of its divisors is an integer number (4878630).

Almost surely, 2^53681656 is an apocalyptic number.

53681656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

53681656 is an abundant number, since it is smaller than the sum of its proper divisors (63405464).

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

53681656 is a wasteful number, since it uses less digits than its factorization.

53681656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136963 (or 136952 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 53681656 is about 7326.7766446098. The cubic root of 53681656 is about 377.2320944658.

The spelling of 53681656 in words is "fifty-three million, six hundred eighty-one thousand, six hundred fifty-six".