55851644 has 6 divisors (see below), whose sum is σ = 97740384. Its totient is φ = 27925820.

The previous prime is 55851641. The next prime is 55851673. The reversal of 55851644 is 44615855.

It is a happy number.

It is a super-2 number, since 2×55851644² = 6238812275005472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55851598 and 55851607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55851641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6981452 + ... + 6981459.

It is an arithmetic number, because the mean of its divisors is an integer number (16290064).

Almost surely, 2^55851644 is an apocalyptic number.

It is an amenable number.

55851644 is a deficient number, since it is larger than the sum of its proper divisors (41888740).

55851644 is a wasteful number, since it uses less digits than its factorization.

55851644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13962915 (or 13962913 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 55851644 is about 7473.3957475836. The cubic root of 55851644 is about 382.2480867936.

The spelling of 55851644 in words is "fifty-five million, eight hundred fifty-one thousand, six hundred forty-four".