55761638 has 16 divisors (see below), whose sum is σ = 84523824. Its totient is φ = 27588960.

The previous prime is 55761631. The next prime is 55761661. The reversal of 55761638 is 83616755.

It is a junction number, because it is equal to n+sod(n) for n = 55761595 and 55761604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55761631) 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, 120728 + ... + 121188.

It is an arithmetic number, because the mean of its divisors is an integer number (5282739).

Almost surely, 2^55761638 is an apocalyptic number.

55761638 is a deficient number, since it is larger than the sum of its proper divisors (28762186).

55761638 is a wasteful number, since it uses less digits than its factorization.

55761638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967.

The product of its digits is 151200, while the sum is 41.

The square root of 55761638 is about 7467.3715589891. The cubic root of 55761638 is about 382.0426430105.

The spelling of 55761638 in words is "fifty-five million, seven hundred sixty-one thousand, six hundred thirty-eight".