55681692 has 24 divisors (see below), whose sum is σ = 141735552. Its totient is φ = 16873200.

The previous prime is 55681631. The next prime is 55681721. The reversal of 55681692 is 29618655.

It is a congruent number.

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, 210784 + ... + 211047.

It is an arithmetic number, because the mean of its divisors is an integer number (5905648).

Almost surely, 2^55681692 is an apocalyptic number.

It is an amenable number.

55681692 is an abundant number, since it is smaller than the sum of its proper divisors (86053860).

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

55681692 is a wasteful number, since it uses less digits than its factorization.

55681692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421849 (or 421847 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 55681692 is about 7462.0166175103. The cubic root of 55681692 is about 381.8599762743.

It can be divided in two parts, 5568 and 1692, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 55681692 in words is "fifty-five million, six hundred eighty-one thousand, six hundred ninety-two".