55767768 has 64 divisors (see below), whose sum is σ = 160565760. Its totient is φ = 15810816.

The previous prime is 55767743. The next prime is 55767787. The reversal of 55767768 is 86776755.

It is a super-2 number, since 2×55767768² = 6220087895403648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55767768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21805 + ... + 24227.

It is an arithmetic number, because the mean of its divisors is an integer number (2508840).

Almost surely, 2^55767768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55767768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80282880).

55767768 is an abundant number, since it is smaller than the sum of its proper divisors (104797992).

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

55767768 is a wasteful number, since it uses less digits than its factorization.

55767768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576 (or 2572 counting only the distinct ones).

The product of its digits is 2469600, while the sum is 51.

The square root of 55767768 is about 7467.7820000319. The cubic root of 55767768 is about 382.0566420947.

The spelling of 55767768 in words is "fifty-five million, seven hundred sixty-seven thousand, seven hundred sixty-eight".