55377681 has 8 divisors (see below), whose sum is σ = 74071104. Its totient is φ = 36801360.

The previous prime is 55377677. The next prime is 55377689. The reversal of 55377681 is 18677355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55377681 - 2² = 55377677 is a prime.

It is a super-2 number, since 2×55377681² = 6133375105875522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55377689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28165 + ... + 30066.

It is an arithmetic number, because the mean of its divisors is an integer number (9258888).

Almost surely, 2^55377681 is an apocalyptic number.

It is an amenable number.

55377681 is a deficient number, since it is larger than the sum of its proper divisors (18693423).

55377681 is a wasteful number, since it uses less digits than its factorization.

55377681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58551.

The product of its digits is 176400, while the sum is 42.

The square root of 55377681 is about 7441.6181708013. The cubic root of 55377681 is about 381.1637477192.

The spelling of 55377681 in words is "fifty-five million, three hundred seventy-seven thousand, six hundred eighty-one".