55157660 has 12 divisors (see below), whose sum is σ = 115831128. Its totient is φ = 22063056.

The previous prime is 55157659. The next prime is 55157677. The reversal of 55157660 is 6675155.

55157660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55157660.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378922 + ... + 1378961.

It is an arithmetic number, because the mean of its divisors is an integer number (9652594).

Almost surely, 2^55157660 is an apocalyptic number.

It is an amenable number.

55157660 is an abundant number, since it is smaller than the sum of its proper divisors (60673468).

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

55157660 is a wasteful number, since it uses less digits than its factorization.

55157660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757892 (or 2757890 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 55157660 is about 7426.8203155859. The cubic root of 55157660 is about 380.6582772846.

The spelling of 55157660 in words is "fifty-five million, one hundred fifty-seven thousand, six hundred sixty".