55772689 has 8 divisors (see below), whose sum is σ = 65796608. Its totient is φ = 46262880.

The previous prime is 55772687. The next prime is 55772711. The reversal of 55772689 is 98627755.

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

It is a cyclic number.

It is not a de Polignac number, because 55772689 - 2¹ = 55772687 is a prime.

It is a super-2 number, since 2×55772689² = 6221185676581442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55772681) 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, 128292 + ... + 128725.

It is an arithmetic number, because the mean of its divisors is an integer number (8224576).

Almost surely, 2^55772689 is an apocalyptic number.

It is an amenable number.

55772689 is a deficient number, since it is larger than the sum of its proper divisors (10023919).

55772689 is a wasteful number, since it uses less digits than its factorization.

55772689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257055.

The product of its digits is 1058400, while the sum is 49.

The square root of 55772689 is about 7468.1114747974. Note that the first 3 decimals coincide. The cubic root of 55772689 is about 382.0678794426.

The spelling of 55772689 in words is "fifty-five million, seven hundred seventy-two thousand, six hundred eighty-nine".